ASM未正常启动,使用dd找回数据文件

Posted on 2012 年 04 月 30 日 by 惜分飞

本篇主要测试在ASM未启动状态下,如何找出找出文件文件对应的AU,并且通过dd还原出数据文件
参考文档:ASM的文件管理深入解析（内含开源的ASM文件挖掘研究版程序）
模拟测试数据

SQL> alter database datafile '+XIFENFEI/xff/datafile/xifenfei.268.781905429' resize 50M ;

Database altered.

SQL> alter database datafile '+XIFENFEI/xff/datafile/xifenfei.268.781905429' autoextend off;

Database altered.

SQL> select GROUP_NUMBER from V$ASM_DISKGROUP where NAME like '%XIFENFEI%';
 
GROUP_NUMBER
------------
           2

SQL> select DISK_NUMBER,path from v$asm_disk where GROUP_NUMBER=2;

DISK_NUMBER PATH
----------- ---------------------------------------------
          1 /dev/oracleasm/disks/VOL4
          0 /dev/oracleasm/disks/VOL3

SQL> create table t_xifenfei tablespace xifenfei
  2  as
  3  select  * from dba_objects;

Table created.

SQL> select count(*)  from t_xifenfei;

  COUNT(*)
----------
     74537

kfed找出相关AU映射

------------------------------------------------------------------------------
1号文件的第一个AU（0号盘2号AU）中，只能保存1至255号文件的。
从256号文件开始，AU的分布信息保存在1号文件第二个AU中，也就是（1号盘，64号AU）。
其中第一个块（0号块），对应256号文件。1号块对应257号文件，等等，依此类推。
------------------------------------------------------------------------------
[grid@rac1 disks]$  kfed read /dev/oracleasm/disks/VOL3 aun=2 blkn=1|more

kfffde[0].xptr.au:                    2 ; 0x4a0: 0x00000002
kfffde[0].xptr.disk:                  0 ; 0x4a4: 0x0000
kfffde[0].xptr.flags:                 0 ; 0x4a6: L=0 E=0 D=0 S=0
kfffde[0].xptr.chk:                  40 ; 0x4a7: 0x28
kfffde[1].xptr.au:                   64 ; 0x4a8: 0x00000040
kfffde[1].xptr.disk:                  1 ; 0x4ac: 0x0001
kfffde[1].xptr.flags:                 0 ; 0x4ae: L=0 E=0 D=0 S=0
kfffde[1].xptr.chk:                 107 ; 0x4af: 0x6b
kfffde[2].xptr.au:           4294967295 ; 0x4b0: 0xffffffff
kfffde[2].xptr.disk:              65535 ; 0x4b4: 0xffff
kfffde[2].xptr.flags:                 0 ; 0x4b6: L=0 E=0 D=0 S=0
kfffde[2].xptr.chk:                  42 ; 0x4b7: 0x2a

[grid@rac1 disks]$  kfed read /dev/oracleasm/disks/VOL4 aun=64 blkn=12|more
kfffde[0].xptr.au:                  681 ; 0x4a0: 0x000002a9
kfffde[0].xptr.disk:                  0 ; 0x4a4: 0x0000
kfffde[0].xptr.flags:                 0 ; 0x4a6: L=0 E=0 D=0 S=0
kfffde[0].xptr.chk:                 129 ; 0x4a7: 0x81
kfffde[1].xptr.au:                 1092 ; 0x4a8: 0x00000444
kfffde[1].xptr.disk:                  1 ; 0x4ac: 0x0001
kfffde[1].xptr.flags:                 0 ; 0x4ae: L=0 E=0 D=0 S=0
kfffde[1].xptr.chk:                 107 ; 0x4af: 0x6b
kfffde[2].xptr.au:                 1093 ; 0x4b0: 0x00000445
kfffde[2].xptr.disk:                  1 ; 0x4b4: 0x0001
kfffde[2].xptr.flags:                 0 ; 0x4b6: L=0 E=0 D=0 S=0
kfffde[2].xptr.chk:                 106 ; 0x4b7: 0x6a
kfffde[3].xptr.au:                  682 ; 0x4b8: 0x000002aa
kfffde[3].xptr.disk:                  0 ; 0x4bc: 0x0000
kfffde[3].xptr.flags:                 0 ; 0x4be: L=0 E=0 D=0 S=0
kfffde[3].xptr.chk:                 130 ; 0x4bf: 0x82
kfffde[4].xptr.au:                 1094 ; 0x4c0: 0x00000446
kfffde[4].xptr.disk:                  1 ; 0x4c4: 0x0001
kfffde[4].xptr.flags:                 0 ; 0x4c6: L=0 E=0 D=0 S=0
kfffde[4].xptr.chk:                 105 ; 0x4c7: 0x69
kfffde[5].xptr.au:                 1095 ; 0x4c8: 0x00000447
kfffde[5].xptr.disk:                  1 ; 0x4cc: 0x0001
kfffde[5].xptr.flags:                 0 ; 0x4ce: L=0 E=0 D=0 S=0
kfffde[5].xptr.chk:                 104 ; 0x4cf: 0x68
kfffde[6].xptr.au:                  683 ; 0x4d0: 0x000002ab
kfffde[6].xptr.disk:                  0 ; 0x4d4: 0x0000
kfffde[6].xptr.flags:                 0 ; 0x4d6: L=0 E=0 D=0 S=0
kfffde[6].xptr.chk:                 131 ; 0x4d7: 0x83
kfffde[7].xptr.au:                 1096 ; 0x4d8: 0x00000448
kfffde[7].xptr.disk:                  1 ; 0x4dc: 0x0001
kfffde[7].xptr.flags:                 0 ; 0x4de: L=0 E=0 D=0 S=0
kfffde[7].xptr.chk:                 103 ; 0x4df: 0x67
kfffde[8].xptr.au:                  684 ; 0x4e0: 0x000002ac
kfffde[8].xptr.disk:                  0 ; 0x4e4: 0x0000
kfffde[8].xptr.flags:                 0 ; 0x4e6: L=0 E=0 D=0 S=0
kfffde[8].xptr.chk:                 132 ; 0x4e7: 0x84
kfffde[9].xptr.au:                 1097 ; 0x4e8: 0x00000449
kfffde[9].xptr.disk:                  1 ; 0x4ec: 0x0001
kfffde[9].xptr.flags:                 0 ; 0x4ee: L=0 E=0 D=0 S=0
kfffde[9].xptr.chk:                 102 ; 0x4ef: 0x66
kfffde[10].xptr.au:                1098 ; 0x4f0: 0x0000044a
kfffde[10].xptr.disk:                 1 ; 0x4f4: 0x0001
kfffde[10].xptr.flags:                0 ; 0x4f6: L=0 E=0 D=0 S=0
kfffde[10].xptr.chk:                101 ; 0x4f7: 0x65
kfffde[11].xptr.au:                 685 ; 0x4f8: 0x000002ad
kfffde[11].xptr.disk:                 0 ; 0x4fc: 0x0000
kfffde[11].xptr.flags:                0 ; 0x4fe: L=0 E=0 D=0 S=0
kfffde[11].xptr.chk:                133 ; 0x4ff: 0x85
kfffde[12].xptr.au:                1099 ; 0x500: 0x0000044b
kfffde[12].xptr.disk:                 1 ; 0x504: 0x0001
kfffde[12].xptr.flags:                0 ; 0x506: L=0 E=0 D=0 S=0
kfffde[12].xptr.chk:                100 ; 0x507: 0x64
kfffde[13].xptr.au:                 686 ; 0x508: 0x000002ae
kfffde[13].xptr.disk:                 0 ; 0x50c: 0x0000
kfffde[13].xptr.flags:                0 ; 0x50e: L=0 E=0 D=0 S=0
kfffde[13].xptr.chk:                134 ; 0x50f: 0x86
kfffde[14].xptr.au:                1100 ; 0x510: 0x0000044c
kfffde[14].xptr.disk:                 1 ; 0x514: 0x0001
kfffde[14].xptr.flags:                0 ; 0x516: L=0 E=0 D=0 S=0
kfffde[14].xptr.chk:                 99 ; 0x517: 0x63
kfffde[15].xptr.au:                1101 ; 0x518: 0x0000044d
kfffde[15].xptr.disk:                 1 ; 0x51c: 0x0001
kfffde[15].xptr.flags:                0 ; 0x51e: L=0 E=0 D=0 S=0
kfffde[15].xptr.chk:                 98 ; 0x51f: 0x62
kfffde[16].xptr.au:                 687 ; 0x520: 0x000002af
kfffde[16].xptr.disk:                 0 ; 0x524: 0x0000
kfffde[16].xptr.flags:                0 ; 0x526: L=0 E=0 D=0 S=0
kfffde[16].xptr.chk:                135 ; 0x527: 0x87
kfffde[17].xptr.au:                1102 ; 0x528: 0x0000044e
kfffde[17].xptr.disk:                 1 ; 0x52c: 0x0001
kfffde[17].xptr.flags:                0 ; 0x52e: L=0 E=0 D=0 S=0
kfffde[17].xptr.chk:                 97 ; 0x52f: 0x61
kfffde[18].xptr.au:                1103 ; 0x530: 0x0000044f
kfffde[18].xptr.disk:                 1 ; 0x534: 0x0001
kfffde[18].xptr.flags:                0 ; 0x536: L=0 E=0 D=0 S=0
kfffde[18].xptr.chk:                 96 ; 0x537: 0x60
kfffde[19].xptr.au:                 688 ; 0x538: 0x000002b0
kfffde[19].xptr.disk:                 0 ; 0x53c: 0x0000
kfffde[19].xptr.flags:                0 ; 0x53e: L=0 E=0 D=0 S=0
kfffde[19].xptr.chk:                152 ; 0x53f: 0x98
kfffde[20].xptr.au:                1104 ; 0x540: 0x00000450
kfffde[20].xptr.disk:                 1 ; 0x544: 0x0001
kfffde[20].xptr.flags:                0 ; 0x546: L=0 E=0 D=0 S=0
kfffde[20].xptr.chk:                127 ; 0x547: 0x7f
kfffde[21].xptr.au:                 689 ; 0x548: 0x000002b1
kfffde[21].xptr.disk:                 0 ; 0x54c: 0x0000
kfffde[21].xptr.flags:                0 ; 0x54e: L=0 E=0 D=0 S=0
kfffde[21].xptr.chk:                153 ; 0x54f: 0x99
kfffde[22].xptr.au:                1105 ; 0x550: 0x00000451
kfffde[22].xptr.disk:                 1 ; 0x554: 0x0001
kfffde[22].xptr.flags:                0 ; 0x556: L=0 E=0 D=0 S=0
kfffde[22].xptr.chk:                126 ; 0x557: 0x7e
kfffde[23].xptr.au:                1106 ; 0x558: 0x00000452
kfffde[23].xptr.disk:                 1 ; 0x55c: 0x0001
kfffde[23].xptr.flags:                0 ; 0x55e: L=0 E=0 D=0 S=0
kfffde[23].xptr.chk:                125 ; 0x55f: 0x7d
kfffde[24].xptr.au:                 690 ; 0x560: 0x000002b2
kfffde[24].xptr.disk:                 0 ; 0x564: 0x0000
kfffde[24].xptr.flags:                0 ; 0x566: L=0 E=0 D=0 S=0
kfffde[24].xptr.chk:                154 ; 0x567: 0x9a
kfffde[25].xptr.au:                1107 ; 0x568: 0x00000453
kfffde[25].xptr.disk:                 1 ; 0x56c: 0x0001
kfffde[25].xptr.flags:                0 ; 0x56e: L=0 E=0 D=0 S=0
kfffde[25].xptr.chk:                124 ; 0x56f: 0x7c
kfffde[26].xptr.au:                 691 ; 0x570: 0x000002b3
kfffde[26].xptr.disk:                 0 ; 0x574: 0x0000
kfffde[26].xptr.flags:                0 ; 0x576: L=0 E=0 D=0 S=0
kfffde[26].xptr.chk:                155 ; 0x577: 0x9b
kfffde[27].xptr.au:                1108 ; 0x578: 0x00000454
kfffde[27].xptr.disk:                 1 ; 0x57c: 0x0001
kfffde[27].xptr.flags:                0 ; 0x57e: L=0 E=0 D=0 S=0
kfffde[27].xptr.chk:                123 ; 0x57f: 0x7b
kfffde[28].xptr.au:                1109 ; 0x580: 0x00000455
kfffde[28].xptr.disk:                 1 ; 0x584: 0x0001
kfffde[28].xptr.flags:                0 ; 0x586: L=0 E=0 D=0 S=0
kfffde[28].xptr.chk:                122 ; 0x587: 0x7a
kfffde[29].xptr.au:                 692 ; 0x588: 0x000002b4
kfffde[29].xptr.disk:                 0 ; 0x58c: 0x0000
kfffde[29].xptr.flags:                0 ; 0x58e: L=0 E=0 D=0 S=0
kfffde[29].xptr.chk:                156 ; 0x58f: 0x9c
kfffde[30].xptr.au:                1110 ; 0x590: 0x00000456
kfffde[30].xptr.disk:                 1 ; 0x594: 0x0001
kfffde[30].xptr.flags:                0 ; 0x596: L=0 E=0 D=0 S=0
kfffde[30].xptr.chk:                121 ; 0x597: 0x79
kfffde[31].xptr.au:                1111 ; 0x598: 0x00000457
kfffde[31].xptr.disk:                 1 ; 0x59c: 0x0001
kfffde[31].xptr.flags:                0 ; 0x59e: L=0 E=0 D=0 S=0
kfffde[31].xptr.chk:                120 ; 0x59f: 0x78
kfffde[32].xptr.au:                 693 ; 0x5a0: 0x000002b5
kfffde[32].xptr.disk:                 0 ; 0x5a4: 0x0000
kfffde[32].xptr.flags:                0 ; 0x5a6: L=0 E=0 D=0 S=0
kfffde[32].xptr.chk:                157 ; 0x5a7: 0x9d
kfffde[33].xptr.au:                1112 ; 0x5a8: 0x00000458
kfffde[33].xptr.disk:                 1 ; 0x5ac: 0x0001
kfffde[33].xptr.flags:                0 ; 0x5ae: L=0 E=0 D=0 S=0
kfffde[33].xptr.chk:                119 ; 0x5af: 0x77
kfffde[34].xptr.au:                 694 ; 0x5b0: 0x000002b6
kfffde[34].xptr.disk:                 0 ; 0x5b4: 0x0000
kfffde[34].xptr.flags:                0 ; 0x5b6: L=0 E=0 D=0 S=0
kfffde[34].xptr.chk:                158 ; 0x5b7: 0x9e
kfffde[35].xptr.au:                1113 ; 0x5b8: 0x00000459
kfffde[35].xptr.disk:                 1 ; 0x5bc: 0x0001
kfffde[35].xptr.flags:                0 ; 0x5be: L=0 E=0 D=0 S=0
kfffde[35].xptr.chk:                118 ; 0x5bf: 0x76
kfffde[36].xptr.au:                1114 ; 0x5c0: 0x0000045a
kfffde[36].xptr.disk:                 1 ; 0x5c4: 0x0001
kfffde[36].xptr.flags:                0 ; 0x5c6: L=0 E=0 D=0 S=0
kfffde[36].xptr.chk:                117 ; 0x5c7: 0x75
kfffde[37].xptr.au:                 695 ; 0x5c8: 0x000002b7
kfffde[37].xptr.disk:                 0 ; 0x5cc: 0x0000
kfffde[37].xptr.flags:                0 ; 0x5ce: L=0 E=0 D=0 S=0
kfffde[37].xptr.chk:                159 ; 0x5cf: 0x9f
kfffde[38].xptr.au:                1115 ; 0x5d0: 0x0000045b
kfffde[38].xptr.disk:                 1 ; 0x5d4: 0x0001
kfffde[38].xptr.flags:                0 ; 0x5d6: L=0 E=0 D=0 S=0
kfffde[38].xptr.chk:                116 ; 0x5d7: 0x74
kfffde[39].xptr.au:                1116 ; 0x5d8: 0x0000045c
kfffde[39].xptr.disk:                 1 ; 0x5dc: 0x0001
kfffde[39].xptr.flags:                0 ; 0x5de: L=0 E=0 D=0 S=0
kfffde[39].xptr.chk:                115 ; 0x5df: 0x73
kfffde[40].xptr.au:                 696 ; 0x5e0: 0x000002b8
kfffde[40].xptr.disk:                 0 ; 0x5e4: 0x0000
kfffde[40].xptr.flags:                0 ; 0x5e6: L=0 E=0 D=0 S=0
kfffde[40].xptr.chk:                144 ; 0x5e7: 0x90
kfffde[41].xptr.au:                1117 ; 0x5e8: 0x0000045d
kfffde[41].xptr.disk:                 1 ; 0x5ec: 0x0001
kfffde[41].xptr.flags:                0 ; 0x5ee: L=0 E=0 D=0 S=0
kfffde[41].xptr.chk:                114 ; 0x5ef: 0x72
kfffde[42].xptr.au:                 697 ; 0x5f0: 0x000002b9
kfffde[42].xptr.disk:                 0 ; 0x5f4: 0x0000
kfffde[42].xptr.flags:                0 ; 0x5f6: L=0 E=0 D=0 S=0
kfffde[42].xptr.chk:                145 ; 0x5f7: 0x91
kfffde[43].xptr.au:                1118 ; 0x5f8: 0x0000045e
kfffde[43].xptr.disk:                 1 ; 0x5fc: 0x0001
kfffde[43].xptr.flags:                0 ; 0x5fe: L=0 E=0 D=0 S=0
kfffde[43].xptr.chk:                113 ; 0x5ff: 0x71
kfffde[44].xptr.au:                1119 ; 0x600: 0x0000045f
kfffde[44].xptr.disk:                 1 ; 0x604: 0x0001
kfffde[44].xptr.flags:                0 ; 0x606: L=0 E=0 D=0 S=0
kfffde[44].xptr.chk:                112 ; 0x607: 0x70
kfffde[45].xptr.au:                 698 ; 0x608: 0x000002ba
kfffde[45].xptr.disk:                 0 ; 0x60c: 0x0000
kfffde[45].xptr.flags:                0 ; 0x60e: L=0 E=0 D=0 S=0
kfffde[45].xptr.chk:                146 ; 0x60f: 0x92
kfffde[46].xptr.au:                1120 ; 0x610: 0x00000460
kfffde[46].xptr.disk:                 1 ; 0x614: 0x0001
kfffde[46].xptr.flags:                0 ; 0x616: L=0 E=0 D=0 S=0
kfffde[46].xptr.chk:                 79 ; 0x617: 0x4f
kfffde[47].xptr.au:                 699 ; 0x618: 0x000002bb
kfffde[47].xptr.disk:                 0 ; 0x61c: 0x0000
kfffde[47].xptr.flags:                0 ; 0x61e: L=0 E=0 D=0 S=0
kfffde[47].xptr.chk:                147 ; 0x61f: 0x93
kfffde[48].xptr.au:                1121 ; 0x620: 0x00000461
kfffde[48].xptr.disk:                 1 ; 0x624: 0x0001
kfffde[48].xptr.flags:                0 ; 0x626: L=0 E=0 D=0 S=0
kfffde[48].xptr.chk:                 78 ; 0x627: 0x4e
kfffde[49].xptr.au:                1122 ; 0x628: 0x00000462
kfffde[49].xptr.disk:                 1 ; 0x62c: 0x0001
kfffde[49].xptr.flags:                0 ; 0x62e: L=0 E=0 D=0 S=0
kfffde[49].xptr.chk:                 77 ; 0x62f: 0x4d
kfffde[50].xptr.au:                 700 ; 0x630: 0x000002bc
kfffde[50].xptr.disk:                 0 ; 0x634: 0x0000
kfffde[50].xptr.flags:                0 ; 0x636: L=0 E=0 D=0 S=0
kfffde[50].xptr.chk:                148 ; 0x637: 0x94
--到此截止
kfffde[51].xptr.au:          4294967295 ; 0x638: 0xffffffff
kfffde[51].xptr.disk:             65535 ; 0x63c: 0xffff
kfffde[51].xptr.flags:                0 ; 0x63e: L=0 E=0 D=0 S=0
kfffde[51].xptr.chk:                 42 ; 0x63f: 0x2a

dd操作

[grid@rac1 disks]$ dd if=/dev/oracleasm/disks/VOL3 bs=1024k count=1 skip=681 seek=0 of=/tmp/xifenfei01.dbf
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0924808 seconds, 11.3 MB/s
[grid@rac1 disks]$ dd if=/dev/oracleasm/disks/VOL4 bs=1024k count=1 skip=1092 seek=1 of=/tmp/xifenfei01.dbf
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.051765 seconds, 20.3 MB/s
[grid@rac1 disks]$ dd if=/dev/oracleasm/disks/VOL4 bs=1024k count=1 skip=1093 seek=2 of=/tmp/xifenfei01.dbf
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0695681 seconds, 15.1 MB/s
[grid@rac1 disks]$ dd if=/dev/oracleasm/disks/VOL3 bs=1024k count=1 skip=682 seek=3 of=/tmp/xifenfei01.dbf
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0516708 seconds, 20.3 MB/s
…………类此处理…………
[grid@rac1 disks]$ dd if=/dev/oracleasm/disks/VOL4 bs=1024k count=1 skip=1122 seek=49 of=/tmp/xifenfei01.dbf
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0699421 seconds, 15.0 MB/s
[grid@rac1 disks]$ dd if=/dev/oracleasm/disks/VOL3 bs=1024k count=1 skip=700 seek=50 of=/tmp/xifenfei01.dbf
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0650649 seconds, 16.1 MB/s

修改所有者

[root@rac1 ~]#  chown oracle.oinstall /tmp/xifenfei01.dbf
[root@rac1 ~]# ll /tmp/xifenfei01.dbf 
-rw-r--r-- 1 oracle oinstall 53477376 Apr 30 12:57 /tmp/xifenfei01.dbf

dbv验证数据文件

[oracle@rac1 ~]$ dbv file='+XIFENFEI/xff/datafile/xifenfei.268.781905429' userid=sys/xifenfei

DBVERIFY: Release 11.2.0.3.0 - Production on Mon Apr 30 12:53:32 2012

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

DBVERIFY - Verification starting : FILE = +XIFENFEI/xff/datafile/xifenfei.268.781905429


DBVERIFY - Verification complete

Total Pages Examined         : 6400
Total Pages Processed (Data) : 1066
Total Pages Failing   (Data) : 0
Total Pages Processed (Index): 0
Total Pages Failing   (Index): 0
Total Pages Processed (Other): 156
Total Pages Processed (Seg)  : 0
Total Pages Failing   (Seg)  : 0
Total Pages Empty            : 5178
Total Pages Marked Corrupt   : 0
Total Pages Influx           : 0
Total Pages Encrypted        : 0
Highest block SCN            : 0 (0.0)
[oracle@rac1 ~]$ dbv file='/tmp/xifenfei01.dbf'

DBVERIFY: Release 11.2.0.3.0 - Production on Mon Apr 30 12:53:50 2012

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

DBVERIFY - Verification starting : FILE = /tmp/xifenfei01.dbf


DBVERIFY - Verification complete

Total Pages Examined         : 6400
Total Pages Processed (Data) : 1066
Total Pages Failing   (Data) : 0
Total Pages Processed (Index): 0
Total Pages Failing   (Index): 0
Total Pages Processed (Other): 156
Total Pages Processed (Seg)  : 0
Total Pages Failing   (Seg)  : 0
Total Pages Empty            : 5178
Total Pages Marked Corrupt   : 0
Total Pages Influx           : 0
Total Pages Encrypted        : 0
Highest block SCN            : 1039267 (0.1039267)

数据库验证数据文件

SQL> alter database datafile '+XIFENFEI/xff/datafile/xifenfei.268.781905429' offline;

Database altered.

SQL> alter database rename file '+XIFENFEI/xff/datafile/xifenfei.268.781905429'
  2  to '/tmp/xifenfei01.dbf';

Database altered.

SQL>  recover datafile '/tmp/xifenfei01.dbf';
Media recovery complete.
SQL> alter database datafile '/tmp/xifenfei01.dbf' online;

Database altered.

SQL> select count(*) from t_xifenfei;

  COUNT(*)
----------
     74537

bbed修改ASM中数据

Posted on 2012 年 04 月 30 日 by 惜分飞

本篇文章演示了如何从ASM中通过dd拷贝出某种表的记录,然后通过bbed修改相关记录,再拷贝到库中.说的简单点就是通过dd拷贝出最少的需要对象数据块,然后通过bbed绕过数据库级别对相关记录进行修改
模拟测试数据

--ORACLE数据库中执行
SQL> create tablespace xifenfei datafile '+xifenfei' size 30M autoextend on maxsize 10G;

Tablespace created.

SQL> create table t_xifenfei (id number,name varchar2(10)) tablespace xifenfei;

Table created.

SQL> insert into t_xifenfei values(1,'xifenfei');

1 row created.

SQL> insert into t_xifenfei values(2,'XFF');

1 row created.

SQL> SELECT * FROM T_XIFENFEI;

        ID NAME
---------- ----------
         1 xifenfei
         2 XFF

SQL> commit;

Commit complete.

SQL> select EXTENT_ID, BLOCK_ID, BLOCKS, FILE_ID from dba_extents 
  2  where SEGMENT_NAME='T_XIFENFEI' and OWNER='SYS';

 EXTENT_ID   BLOCK_ID     BLOCKS    FILE_ID
---------- ---------- ---------- ----------
         0        128          8          6

SQL> select name from v$datafile where file#=6;

NAME
----------------------------------------------------
+XIFENFEI/xff/datafile/xifenfei.268.781905429

SQL> select GROUP_NUMBER from V$ASM_DISKGROUP where NAME like '%XIFENFEI%';

GROUP_NUMBER
------------
           2

在ASM用户中查询相关数据

--ASM中执行
SQL> SELECT disk_kffxp, au_kffxp, xnum_kffxp
  2  FROM x$kffxp                      
  3   WHERE GROUP_KFFXP=2 
  4  AND NUMBER_KFFXP=268; 

DISK_KFFXP   AU_KFFXP XNUM_KFFXP
---------- ---------- ----------
         0        681          0
         1       1092          1
         1       1093          2
         0        682          3
         1       1094          4
         1       1095          5
         0        683          6
         1       1096          7
         0        684          8
         1       1097          9
         1       1098         10

DISK_KFFXP   AU_KFFXP XNUM_KFFXP
---------- ---------- ----------
         0        685         11
         1       1099         12
         0        686         13
         1       1100         14
         1       1101         15
         0        687         16
         1       1102         17
         1       1103         18
         0        688         19
         1       1104         20
         0        689         21

DISK_KFFXP   AU_KFFXP XNUM_KFFXP
---------- ---------- ----------
         1       1105         22
         1       1106         23
         0        690         24
         1       1107         25
         0        691         26
         1       1108         27
         1       1109         28
         0        692         29
         1       1110         30

31 rows selected.
--数据文件6的AU分配情况

SQL> select 128*8/1024 from dual;

128*8/1024
----------
         1


SQL> select 8*8/1024 from dual;

  8*8/1024
----------
     .0625
--可以得出该表T_XIFENFEI的数据分布在第二块AU中(DISK_KFFXP=1/AU_KFFXP=1092/XNUM_KFFXP=1)

SQL> select name, path from v$asm_disk where group_number=2     
  2  and disk_number=1;

NAME                           PATH
------------------------------ --------------------------
XIFENFEI_0001                  /dev/oracleasm/disks/VOL4

找出对应磁盘或者分区

[grid@rac1 ~]$ /etc/init.d/oracleasm querydisk -d VOL4
Disk "VOL4" is a valid ASM disk on device [8,18]
[grid@rac1 ~]$ cat /proc/partitions |grep "8       18"
   8       18    3879697 sdb2

因为这里的block_id=128,刚好是下一个AU的起点,所以dd操作的起点是第二个AU(DISK_KFFXP=1/AU_KFFXP=1092),而终点是8*8=64K(第二个AU中offset 64KB)

执行dd导出表数据

of=/dev/sdb2
sb=1K
skip=1092*1024=1118208
count=64

[root@rac1 ~]# dd if=/dev/sdb2 bs=1k count=64 skip=1118208|strings
64+0 records in
64+0 records out
65536 bytes (66 kB) copied, 0.000656471 seconds, 99.8 MB/s
XFF,
xifenfei
[root@rac1 ~]# dd if=/dev/sdb2 bs=1k count=64 skip=1118208 of=/tmp/t_xifenfe.tab
64+0 records in
64+0 records out
65536 bytes (66 kB) copied, 0.00226337 seconds, 29.0 MB/s
[root@rac1 ~]# chown oracle.oinstall /tmp/t_xifenfe.tab 
[root@rac1 ~]# ll /tmp/t_xifenfe.tab 
-rw-r--r-- 1 oracle oinstall 65536 Apr 29 21:54 /tmp/t_xifenfe.tab

bbed 修改数据内容

[oracle@rac1 ~]$ bbed
Password: 

BBED: Release 2.0.0.0.0 - Limited Production on Sun Apr 29 22:43:56 2012

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

************* !!! For Oracle Internal Use only !!! ***************

BBED> set filename '/tmp/t_xifenfe.tab'
        FILENAME        /tmp/t_xifenfe.tab

BBED> set block 4
        BLOCK#          4

BBED> set mode edit
        MODE            Edit

BBED> set blocksize 8192
        BLOCKSIZE       8192

BBED> map
 File: /tmp/t_xifenfe.tab (0)
 Block: 4                                     Dba:0x00000000
------------------------------------------------------------
 KTB Data Block (Table/Cluster)

 struct kcbh, 20 bytes                      @0       

 struct ktbbh, 72 bytes                     @20      

 struct kdbh, 14 bytes                      @100     

 struct kdbt[1], 4 bytes                    @114     

 sb2 kdbr[2]                                @118     

 ub1 freespace[8041]                        @122     

 ub1 rowdata[25]                            @8163    

 ub4 tailchk                                @8188    


BBED> p kdbr
sb2 kdbr[0]                                 @118      8073
sb2 kdbr[1]                                 @120      8063

BBED> find /c XFF
 File: /tmp/t_xifenfe.tab (0)
 Block: 4                Offsets: 8170 to 8191           Dba:0x00000000
------------------------------------------------------------------------
 5846462c 010202c1 02087869 66656e66 65690106 ba33 

 <32 bytes per line>

BBED> dump /v
 File: /tmp/t_xifenfe.tab (0)
 Block: 4       Offsets: 8170 to 8191  Dba:0x00000000
-------------------------------------------------------
 5846462c 010202c1 02087869 66656e66 l XFF,......xifenf
 65690106 ba33                       l ei...3

 <16 bytes per line>

BBED> m /c xff
 File: /tmp/t_xifenfe.tab (0)
 Block: 4                Offsets: 8170 to 8191           Dba:0x00000000
------------------------------------------------------------------------
 7866662c 010202c1 02087869 66656e66 65690106 ba33 

 <32 bytes per line>

BBED> dump /v
 File: /tmp/t_xifenfe.tab (0)
 Block: 4       Offsets: 8170 to 8191  Dba:0x00000000
-------------------------------------------------------
 7866662c 010202c1 02087869 66656e66 l xff,......xifenf
 65690106 ba33                       l ei...3

 <16 bytes per line>

BBED> find /c xifenfei
 File: /tmp/t_xifenfe.tab (0)
 Block: 4                Offsets: 8180 to 8191           Dba:0x00000000
------------------------------------------------------------------------
 78696665 6e666569 0106ba33 

 <32 bytes per line>

BBED> dump /v
 File: /tmp/t_xifenfe.tab (0)
 Block: 4       Offsets: 8180 to 8191  Dba:0x00000000
-------------------------------------------------------
 78696665 6e666569 0106ba33          l xifenfei...3

 <16 bytes per line>

BBED> m /c XIFENFEI
 File: /tmp/t_xifenfe.tab (0)
 Block: 4                Offsets: 8180 to 8191           Dba:0x00000000
------------------------------------------------------------------------
 58494645 4e464549 0106ba33 

 <32 bytes per line>

BBED> dump /v
 File: /tmp/t_xifenfe.tab (0)
 Block: 4       Offsets: 8180 to 8191  Dba:0x00000000
-------------------------------------------------------
 58494645 4e464549 0106ba33          l XIFENFEI...3

 <16 bytes per line>

BBED> sum
Check value for File 0, Block 4:
current = 0xd332, required = 0xf332

BBED> sum apply
Check value for File 0, Block 4:
current = 0xf332, required = 0xf332

BBED> set offset 8073
        OFFSET          8073

BBED> dump /v
 File: /tmp/t_xifenfe.tab (0)
 Block: 4       Offsets: 8073 to 8191  Dba:0x00000000
-------------------------------------------------------
 00000000 00000000 00000000 00000000 l ................
 00000000 00000000 00000000 00000000 l ................
 00000000 00000000 00000000 00000000 l ................
 00000000 00000000 00000000 00000000 l ................
 00000000 00000000 00000000 00000000 l ................
 00000000 00000000 00002c01 0202c103 l ..........,.....
 03786666 2c010202 c1020858 4946454e l .xff,......XIFEN
 46454901 06ba33                     l FEI...3

 <16 bytes per line>

BBED> exit

dd导入修改后数据验证

--会话1关闭数据库
[oracle@rac1 ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Sun Apr 29 22:48:51 2012

Copyright (c) 1982, 2011, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options

SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.


--会话2导入bbed修改后数据
[root@rac1 ~]# dd of=/dev/sdb2 bs=1k count=64 seek=1118208 if=/tmp/t_xifenfe.tab
64+0 records in
64+0 records out
65536 bytes (66 kB) copied, 0.0014908 seconds, 44.0 MB/s

--会话1启动数据库库查询
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options
[oracle@rac1 ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Sun Apr 29 22:51:00 2012

Copyright (c) 1982, 2011, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup
ORACLE instance started.

Total System Global Area  535662592 bytes
Fixed Size                  1346140 bytes
Variable Size             411043236 bytes
Database Buffers          117440512 bytes
Redo Buffers                5832704 bytes
Database mounted.
Database opened.
SQL> select * from t_xifenfei;

        ID NAME
---------- ----------
         1 XIFENFEI
         2 xff

使用dd复制asm中文件

Posted on 2012 年 04 月 29 日 by 惜分飞

随着数据库新版本的推广ASM肯定会越来越被重视,最近准备系统的学习下ASM,以备突发情况需要,这是asm深入学习第一篇,参考:dd复制ASM中的datafile
查询ASM某个数据文件AU信息

SQL> SELECT GROUP_NUMBER, FILE_NUMBER, NAME 
  2      FROM v$asm_alias
  3  WHERE NAME LIKE '%USER%'
  4   GROUP BY GROUP_NUMBER, FILE_NUMBER, NAME;

GROUP_NUMBER FILE_NUMBER NAME
------------ ----------- -----------------------------
           2         259 USERS.259.776961317


SQL>  SELECT disk_kffxp, au_kffxp, xnum_kffxp
  2    FROM x$kffxp                      
  3     WHERE GROUP_KFFXP=2 
  4    AND NUMBER_KFFXP=259; 

DISK_KFFXP   AU_KFFXP XNUM_KFFXP
---------- ---------- ----------
         1        817          0
         0        507          1
         1        818          2
         0        508          3
         1        819          4
         1        820          5

SQL> select DISK_NUMBER,GROUP_NUMBER,PATH from v$asm_disk 
   2 where GROUP_NUMBER=2 and DISK_NUMBER in(1,0);

DISK_NUMBER GROUP_NUMBER PATH
----------- ------------ -----------------------------------
          1            2 /dev/oracleasm/disks/VOL4
          0            2 /dev/oracleasm/disks/VOL3

查询ASM DISK对应的磁盘或者分区

[grid@rac1 ~]$ /etc/init.d/oracleasm querydisk -d VOL3
Disk "VOL3" is a valid ASM disk on device [8,17]
[grid@rac1 ~]$ /etc/init.d/oracleasm querydisk -d VOL4
Disk "VOL4" is a valid ASM disk on device [8,18]
[grid@rac1 ~]$ cat /proc/partitions |grep "8       17"
   8       17    2409718 sdb1
[grid@rac1 ~]$ cat /proc/partitions |grep "8       18"
   8       18    3879697 sdb2

dd操作磁盘或者分区

[root@rac1 ~]# dd if=/dev/sdb2 bs=1024k count=1 skip=817 of=/tmp/user_1.dbf
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.188362 seconds, 5.6 MB/s
[root@rac1 ~]# dd if=/dev/sdb1 bs=1024k count=1 skip=507 of=/tmp/user_2.dbf
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.259001 seconds, 4.0 MB/s
[root@rac1 ~]# dd if=/dev/sdb2 bs=1024k count=1 skip=818 of=/tmp/user_3.dbf
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.182559 seconds, 5.7 MB/s
[root@rac1 ~]# dd if=/dev/sdb1 bs=1024k count=1 skip=508 of=/tmp/user_4.dbf
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.10011 seconds, 10.5 MB/s
[root@rac1 ~]# dd if=/dev/sdb2 bs=1024k count=2 skip=819 of=/tmp/user_5.dbf
2+0 records in
2+0 records out
2097152 bytes (2.1 MB) copied, 0.22389 seconds, 9.4 MB/s
[root@rac1 ~]# ll /tmp/user_*
-rw-r--r-- 1 root root 1048576 Apr 29 18:50 /tmp/user_1.dbf
-rw-r--r-- 1 root root 1048576 Apr 29 18:51 /tmp/user_2.dbf
-rw-r--r-- 1 root root 1048576 Apr 29 18:51 /tmp/user_3.dbf
-rw-r--r-- 1 root root 1048576 Apr 29 18:51 /tmp/user_4.dbf
-rw-r--r-- 1 root root 2097152 Apr 29 18:51 /tmp/user_5.dbf
[root@rac1 ~]# dd if=/tmp/user_1.dbf bs=1024k count=1 of=/tmp/user_dd.dbf
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0104619 seconds, 100 MB/s
[root@rac1 ~]# dd if=/tmp/user_2.dbf bs=1024k count=1 seek=1 of=/tmp/user_dd.dbf
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0129077 seconds, 81.2 MB/s
[root@rac1 ~]# dd if=/tmp/user_3.dbf bs=1024k count=1 seek=2 of=/tmp/user_dd.dbf
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.00737324 seconds, 142 MB/s
[root@rac1 ~]# dd if=/tmp/user_4.dbf bs=1024k count=1 seek=3 of=/tmp/user_dd.dbf
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0143482 seconds, 73.1 MB/s
[root@rac1 ~]# dd if=/tmp/user_5.dbf bs=1024k count=2 seek=4 of=/tmp/user_dd.dbf
2+0 records in
2+0 records out
2097152 bytes (2.1 MB) copied, 0.0809296 seconds, 25.9 MB/s
[root@rac1 ~]# ll /tmp/user_*
-rw-r--r-- 1 root root 1048576 Apr 29 18:50 /tmp/user_1.dbf
-rw-r--r-- 1 root root 1048576 Apr 29 18:51 /tmp/user_2.dbf
-rw-r--r-- 1 root root 1048576 Apr 29 18:51 /tmp/user_3.dbf
-rw-r--r-- 1 root root 1048576 Apr 29 18:51 /tmp/user_4.dbf
-rw-r--r-- 1 root root 2097152 Apr 29 18:51 /tmp/user_5.dbf
-rw-r--r-- 1 root root 5242880 Apr 29 18:54 /tmp/user_dd.dbf
[root@rac1 ~]# chown oracle.oinstall /tmp/user_dd.dbf 
[root@rac1 ~]# ll /tmp/user_*
-rw-r--r-- 1 root   root     1048576 Apr 29 18:50 /tmp/user_1.dbf
-rw-r--r-- 1 root   root     1048576 Apr 29 18:51 /tmp/user_2.dbf
-rw-r--r-- 1 root   root     1048576 Apr 29 18:51 /tmp/user_3.dbf
-rw-r--r-- 1 root   root     1048576 Apr 29 18:51 /tmp/user_4.dbf
-rw-r--r-- 1 root   root     2097152 Apr 29 18:51 /tmp/user_5.dbf
-rw-r--r-- 1 oracle oinstall 6291456 Apr 29 18:55 /tmp/user_dd.dbf

验证dd拷贝数据文件

[oracle@rac1 ~]$ dbv file='/tmp/user_dd.dbf' 

DBVERIFY: Release 11.2.0.3.0 - Production on Sun Apr 29 18:56:31 2012

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

DBVERIFY - Verification starting : FILE = /tmp/user_dd.dbf


DBVERIFY - Verification complete

Total Pages Examined         : 640
Total Pages Processed (Data) : 15
Total Pages Failing   (Data) : 0
Total Pages Processed (Index): 2
Total Pages Failing   (Index): 0
Total Pages Processed (Other): 590
Total Pages Processed (Seg)  : 0
Total Pages Failing   (Seg)  : 0
Total Pages Empty            : 33
Total Pages Marked Corrupt   : 0
Total Pages Influx           : 0
Total Pages Encrypted        : 0
Highest block SCN            : 782778 (0.782778)
[oracle@rac1 ~]$ dbv userid=sys/xifenfei file='+XIFENFEI/xff/datafile/users.259.776961317' 
> blocksize=8192

DBVERIFY: Release 11.2.0.3.0 - Production on Sun Apr 29 18:58:13 2012

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

DBVERIFY - Verification starting : FILE = +XIFENFEI/xff/datafile/users.259.776961317


DBVERIFY - Verification complete

Total Pages Examined         : 640
Total Pages Processed (Data) : 15
Total Pages Failing   (Data) : 0
Total Pages Processed (Index): 2
Total Pages Failing   (Index): 0
Total Pages Processed (Other): 590
Total Pages Processed (Seg)  : 0
Total Pages Failing   (Seg)  : 0
Total Pages Empty            : 33
Total Pages Marked Corrupt   : 0
Total Pages Influx           : 0
Total Pages Encrypted        : 0
Highest block SCN            : 0 (0.0)

手工修复ASM DISK HEADER 异常

Posted on 2012 年 04 月 17 日 by 惜分飞

今天有网友对asm中的磁盘做了fdisk操作,导致asm disk异常,通过手工修复ASM DISK HEADER 解决该问题,这里通过实验重现,提醒大家操作asm中的硬盘分区需要慎重,平时对ASM DISK HEADER 做好备份
初始化信息

SQL> select * from v$version;

BANNER
----------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production
PL/SQL Release 11.2.0.3.0 - Production
CORE    11.2.0.3.0      Production
TNS for Linux: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production

SQL>  show parameter instance_name;

NAME                                 TYPE       VALUE
------------------------------------ ---------- ----------------
instance_name                        string     +ASM1

SQL> select group_number,DISK_NUMBER,PATH,HEADER_STATUS from v$asm_disk ;

GROUP_NUMBER DISK_NUMBER PATH                           HEADER_STATUS
------------ ----------- ------------------------------ ------------------------
           1           1 /dev/oracleasm/disks/VOL2      MEMBER
           1           0 /dev/oracleasm/disks/VOL1      MEMBER
           2           1 /dev/oracleasm/disks/VOL4      MEMBER
           2           0 /dev/oracleasm/disks/VOL3      MEMBER

[grid@rac1 ~]$ /etc/init.d/oracleasm  querydisk -d VOL3
Disk "VOL3" is a valid ASM disk on device [8,17]
[grid@rac1 ~]$ ll /dev |grep 8,|grep 17
brw-r----- 1 root disk     8,  17 Apr 17 11:37 sdb1
[grid@rac1 ~]$ /etc/init.d/oracleasm  querydisk -d VOL4
Disk "VOL4" is a valid ASM disk on device [8,18]
[grid@rac1 ~]$ ll /dev |grep 8,|grep 18
brw-r----- 1 root disk     8,  18 Apr 17 11:37 sdb2

备份ASM DISK HEADER

[root@rac1 backup_asmheader]# dd if=/dev/sdb1 of=vol3header.dd bs=4096 count=1
1+0 records in
1+0 records out
4096 bytes (4.1 kB) copied, 0.000143581 seconds, 28.5 MB/s
[root@rac1 backup_asmheader]# dd if=/dev/sdb2 of=vol4header.dd bs=4096 count=1
1+0 records in
1+0 records out
4096 bytes (4.1 kB) copied, 0.000147727 seconds, 27.7 MB/s

破坏ASM DISK HEADER

[root@rac1 ~]# dd if=/dev/zero of=/dev/sdb1 bs=4096 count=1
1+0 records in
1+0 records out
4096 bytes (4.1 kB) copied, 4.4421e-05 seconds, 92.2 MB/s

[grid@rac1 ~]$ kfed read /dev/oracleasm/disks/VOL3
kfbh.endian:                          0 ; 0x000: 0x00
kfbh.hard:                            0 ; 0x001: 0x00
kfbh.type:                            0 ; 0x002: KFBTYP_INVALID
kfbh.datfmt:                          0 ; 0x003: 0x00
kfbh.block.blk:                       0 ; 0x004: blk=0
kfbh.block.obj:                       0 ; 0x008: file=0
kfbh.check:                           0 ; 0x00c: 0x00000000
kfbh.fcn.base:                        0 ; 0x010: 0x00000000
kfbh.fcn.wrap:                        0 ; 0x014: 0x00000000
kfbh.spare1:                          0 ; 0x018: 0x00000000
kfbh.spare2:                          0 ; 0x01c: 0x00000000
B4C83200 00000000 00000000 00000000 00000000  [................]
  Repeat 255 times
KFED-00322: Invalid content encountered during block traversal: [kfbtTraverseBlock][Invalid OSM block type][][0]


SQL> select group_number,DISK_NUMBER,PATH,HEADER_STATUS from v$asm_disk ;

GROUP_NUMBER DISK_NUMBER PATH                           HEADER_STATUS
------------ ----------- ------------------------------ ------------------------
           1           1 /dev/oracleasm/disks/VOL2      MEMBER
           1           0 /dev/oracleasm/disks/VOL1      MEMBER
           2           1 /dev/oracleasm/disks/VOL4      MEMBER
           2           0 /dev/oracleasm/disks/VOL3      CANDIDATE

remount diskgroup

SQL> alter diskgroup  xifenfei dismount;

Diskgroup altered.

SQL> alter diskgroup xifenfei mount;
alter diskgroup xifenfei mount
*
ERROR at line 1:
ORA-15032: not all alterations performed
ORA-15017: diskgroup "XIFENFEI" cannot be mounted
ORA-15063: ASM discovered an insufficient number of disks for diskgroup
"XIFENFEI"

查看同一DISKGROUP中其他磁盘kfed

[grid@rac1 ~]$ kfed read /dev/oracleasm/disks/VOL4
kfbh.endian:                          1 ; 0x000: 0x01
kfbh.hard:                          130 ; 0x001: 0x82
kfbh.type:                            1 ; 0x002: KFBTYP_DISKHEAD
kfbh.datfmt:                          1 ; 0x003: 0x01
kfbh.block.blk:                       0 ; 0x004: blk=0
kfbh.block.obj:              2147483649 ; 0x008: disk=1
kfbh.check:                   349717291 ; 0x00c: 0x14d8432b
kfbh.fcn.base:                        0 ; 0x010: 0x00000000
kfbh.fcn.wrap:                        0 ; 0x014: 0x00000000
kfbh.spare1:                          0 ; 0x018: 0x00000000
kfbh.spare2:                          0 ; 0x01c: 0x00000000
kfdhdb.driver.provstr:     ORCLDISKVOL4 ; 0x000: length=12
kfdhdb.driver.reserved[0]:    877416278 ; 0x008: 0x344c4f56
kfdhdb.driver.reserved[1]:            0 ; 0x00c: 0x00000000
kfdhdb.driver.reserved[2]:            0 ; 0x010: 0x00000000
kfdhdb.driver.reserved[3]:            0 ; 0x014: 0x00000000
kfdhdb.driver.reserved[4]:            0 ; 0x018: 0x00000000
kfdhdb.driver.reserved[5]:            0 ; 0x01c: 0x00000000
kfdhdb.compat:                186646528 ; 0x020: 0x0b200000
kfdhdb.dsknum:                        1 ; 0x024: 0x0001
kfdhdb.grptyp:                        1 ; 0x026: KFDGTP_EXTERNAL
kfdhdb.hdrsts:                        3 ; 0x027: KFDHDR_MEMBER
kfdhdb.dskname:           XIFENFEI_0001 ; 0x028: length=13
kfdhdb.grpname:                XIFENFEI ; 0x048: length=8
kfdhdb.fgname:            XIFENFEI_0001 ; 0x068: length=13
kfdhdb.capname:                         ; 0x088: length=0
kfdhdb.crestmp.hi:             32967790 ; 0x0a8: HOUR=0xe DAYS=0x3 MNTH=0x3 YEAR=0x7dc
kfdhdb.crestmp.lo:           2015933440 ; 0x0ac: USEC=0x0 MSEC=0x22d SECS=0x2 MINS=0x1e
kfdhdb.mntstmp.hi:             32969260 ; 0x0b0: HOUR=0xc DAYS=0x11 MNTH=0x4 YEAR=0x7dc
kfdhdb.mntstmp.lo:           3109835776 ; 0x0b4: USEC=0x0 MSEC=0x315 SECS=0x15 MINS=0x2e
kfdhdb.secsize:                     512 ; 0x0b8: 0x0200
kfdhdb.blksize:                    4096 ; 0x0ba: 0x1000
kfdhdb.ausize:                  1048576 ; 0x0bc: 0x00100000
kfdhdb.mfact:                    113792 ; 0x0c0: 0x0001bc80
kfdhdb.dsksize:                    3788 ; 0x0c4: 0x00000ecc
kfdhdb.pmcnt:                         2 ; 0x0c8: 0x00000002
kfdhdb.fstlocn:                       1 ; 0x0cc: 0x00000001
kfdhdb.altlocn:                       2 ; 0x0d0: 0x00000002
kfdhdb.f1b1locn:                      0 ; 0x0d4: 0x00000000
kfdhdb.redomirrors[0]:                0 ; 0x0d8: 0x0000
kfdhdb.redomirrors[1]:                0 ; 0x0da: 0x0000
kfdhdb.redomirrors[2]:                0 ; 0x0dc: 0x0000
kfdhdb.redomirrors[3]:                0 ; 0x0de: 0x0000
kfdhdb.dbcompat:              168820736 ; 0x0e0: 0x0a100000
kfdhdb.grpstmp.hi:             32967790 ; 0x0e4: HOUR=0xe DAYS=0x3 MNTH=0x3 YEAR=0x7dc
kfdhdb.grpstmp.lo:           2015746048 ; 0x0e8: USEC=0x0 MSEC=0x176 SECS=0x2 MINS=0x1e
kfdhdb.vfstart:                       0 ; 0x0ec: 0x00000000
kfdhdb.vfend:                         0 ; 0x0f0: 0x00000000
kfdhdb.spfile:                        0 ; 0x0f4: 0x00000000
kfdhdb.spfflg:                        0 ; 0x0f8: 0x00000000
kfdhdb.ub4spare[0]:                   0 ; 0x0fc: 0x00000000
kfdhdb.ub4spare[1]:                   0 ; 0x100: 0x00000000
kfdhdb.ub4spare[2]:                   0 ; 0x104: 0x00000000
kfdhdb.ub4spare[3]:                   0 ; 0x108: 0x00000000
kfdhdb.ub4spare[4]:                   0 ; 0x10c: 0x00000000
kfdhdb.ub4spare[5]:                   0 ; 0x110: 0x00000000
kfdhdb.ub4spare[6]:                   0 ; 0x114: 0x00000000
kfdhdb.ub4spare[7]:                   0 ; 0x118: 0x00000000
kfdhdb.ub4spare[8]:                   0 ; 0x11c: 0x00000000
kfdhdb.ub4spare[9]:                   0 ; 0x120: 0x00000000
kfdhdb.ub4spare[10]:                  0 ; 0x124: 0x00000000
kfdhdb.ub4spare[11]:                  0 ; 0x128: 0x00000000
kfdhdb.ub4spare[12]:                  0 ; 0x12c: 0x00000000
kfdhdb.ub4spare[13]:                  0 ; 0x130: 0x00000000
kfdhdb.ub4spare[14]:                  0 ; 0x134: 0x00000000
kfdhdb.ub4spare[15]:                  0 ; 0x138: 0x00000000
kfdhdb.ub4spare[16]:                  0 ; 0x13c: 0x00000000
kfdhdb.ub4spare[17]:                  0 ; 0x140: 0x00000000
kfdhdb.ub4spare[18]:                  0 ; 0x144: 0x00000000
kfdhdb.ub4spare[19]:                  0 ; 0x148: 0x00000000
kfdhdb.ub4spare[20]:                  0 ; 0x14c: 0x00000000
kfdhdb.ub4spare[21]:                  0 ; 0x150: 0x00000000
kfdhdb.ub4spare[22]:                  0 ; 0x154: 0x00000000
kfdhdb.ub4spare[23]:                  0 ; 0x158: 0x00000000
kfdhdb.ub4spare[24]:                  0 ; 0x15c: 0x00000000
kfdhdb.ub4spare[25]:                  0 ; 0x160: 0x00000000
kfdhdb.ub4spare[26]:                  0 ; 0x164: 0x00000000
kfdhdb.ub4spare[27]:                  0 ; 0x168: 0x00000000
kfdhdb.ub4spare[28]:                  0 ; 0x16c: 0x00000000
kfdhdb.ub4spare[29]:                  0 ; 0x170: 0x00000000
kfdhdb.ub4spare[30]:                  0 ; 0x174: 0x00000000
kfdhdb.ub4spare[31]:                  0 ; 0x178: 0x00000000
kfdhdb.ub4spare[32]:                  0 ; 0x17c: 0x00000000
kfdhdb.ub4spare[33]:                  0 ; 0x180: 0x00000000
kfdhdb.ub4spare[34]:                  0 ; 0x184: 0x00000000
kfdhdb.ub4spare[35]:                  0 ; 0x188: 0x00000000
kfdhdb.ub4spare[36]:                  0 ; 0x18c: 0x00000000
kfdhdb.ub4spare[37]:                  0 ; 0x190: 0x00000000
kfdhdb.ub4spare[38]:                  0 ; 0x194: 0x00000000
kfdhdb.ub4spare[39]:                  0 ; 0x198: 0x00000000
kfdhdb.ub4spare[40]:                  0 ; 0x19c: 0x00000000
kfdhdb.ub4spare[41]:                  0 ; 0x1a0: 0x00000000
kfdhdb.ub4spare[42]:                  0 ; 0x1a4: 0x00000000
kfdhdb.ub4spare[43]:                  0 ; 0x1a8: 0x00000000
kfdhdb.ub4spare[44]:                  0 ; 0x1ac: 0x00000000
kfdhdb.ub4spare[45]:                  0 ; 0x1b0: 0x00000000
kfdhdb.ub4spare[46]:                  0 ; 0x1b4: 0x00000000
kfdhdb.ub4spare[47]:                  0 ; 0x1b8: 0x00000000
kfdhdb.ub4spare[48]:                  0 ; 0x1bc: 0x00000000
kfdhdb.ub4spare[49]:                  0 ; 0x1c0: 0x00000000
kfdhdb.ub4spare[50]:                  0 ; 0x1c4: 0x00000000
kfdhdb.ub4spare[51]:                  0 ; 0x1c8: 0x00000000
kfdhdb.ub4spare[52]:                  0 ; 0x1cc: 0x00000000
kfdhdb.ub4spare[53]:                  0 ; 0x1d0: 0x00000000
kfdhdb.acdb.aba.seq:                  0 ; 0x1d4: 0x00000000
kfdhdb.acdb.aba.blk:                  0 ; 0x1d8: 0x00000000
kfdhdb.acdb.ents:                     0 ; 0x1dc: 0x0000
kfdhdb.acdb.ub2spare:                 0 ; 0x1de: 0x0000

通过VOL4 kfed修改出VOL3 kfed

[grid@rac1 ~]$ cat vol3.txt
kfbh.endian:                          1 ; 0x000: 0x01
kfbh.hard:                          130 ; 0x001: 0x82
kfbh.type:                            1 ; 0x002: KFBTYP_DISKHEAD
kfbh.datfmt:                          1 ; 0x003: 0x01
kfbh.block.blk:                       0 ; 0x004: blk=0
*kfbh.block.obj:              2147483648 ; 0x008: disk=0
kfbh.check:                   332940500 ; 0x00c: 0x13d844d4
kfbh.fcn.base:                        0 ; 0x010: 0x00000000
kfbh.fcn.wrap:                        0 ; 0x014: 0x00000000
kfbh.spare1:                          0 ; 0x018: 0x00000000
kfbh.spare2:                          0 ; 0x01c: 0x00000000
*kfdhdb.driver.provstr:     ORCLDISKVOL3 ; 0x000: length=12
*kfdhdb.driver.reserved[0]:    860639062 ; 0x008: 0x334c4f56
kfdhdb.driver.reserved[1]:            0 ; 0x00c: 0x00000000
kfdhdb.driver.reserved[2]:            0 ; 0x010: 0x00000000
kfdhdb.driver.reserved[3]:            0 ; 0x014: 0x00000000
kfdhdb.driver.reserved[4]:            0 ; 0x018: 0x00000000
kfdhdb.driver.reserved[5]:            0 ; 0x01c: 0x00000000
kfdhdb.compat:                186646528 ; 0x020: 0x0b200000
*kfdhdb.dsknum:                        0 ; 0x024: 0x0000
kfdhdb.grptyp:                        1 ; 0x026: KFDGTP_EXTERNAL
kfdhdb.hdrsts:                        3 ; 0x027: KFDHDR_MEMBER
*kfdhdb.dskname:           XIFENFEI_0000 ; 0x028: length=13
kfdhdb.grpname:                XIFENFEI ; 0x048: length=8
*kfdhdb.fgname:            XIFENFEI_0000 ; 0x068: length=13
kfdhdb.capname:                         ; 0x088: length=0
kfdhdb.crestmp.hi:             32967790 ; 0x0a8: HOUR=0xe DAYS=0x3 MNTH=0x3 YEAR=0x7dc
kfdhdb.crestmp.lo:           2015933440 ; 0x0ac: USEC=0x0 MSEC=0x22d SECS=0x2 MINS=0x1e
kfdhdb.mntstmp.hi:             32969260 ; 0x0b0: HOUR=0xc DAYS=0x11 MNTH=0x4 YEAR=0x7dc
kfdhdb.mntstmp.lo:           3109835776 ; 0x0b4: USEC=0x0 MSEC=0x315 SECS=0x15 MINS=0x2e
kfdhdb.secsize:                     512 ; 0x0b8: 0x0200
kfdhdb.blksize:                    4096 ; 0x0ba: 0x1000
kfdhdb.ausize:                  1048576 ; 0x0bc: 0x00100000
kfdhdb.mfact:                    113792 ; 0x0c0: 0x0001bc80
*kfdhdb.dsksize:                    2353 ; 0x0c4: 0x00000931
kfdhdb.pmcnt:                         2 ; 0x0c8: 0x00000002
kfdhdb.fstlocn:                       1 ; 0x0cc: 0x00000001
kfdhdb.altlocn:                       2 ; 0x0d0: 0x00000002
*kfdhdb.f1b1locn:                      2 ; 0x0d4: 0x00000002
kfdhdb.redomirrors[0]:                0 ; 0x0d8: 0x0000
kfdhdb.redomirrors[1]:                0 ; 0x0da: 0x0000
kfdhdb.redomirrors[2]:                0 ; 0x0dc: 0x0000
kfdhdb.redomirrors[3]:                0 ; 0x0de: 0x0000
kfdhdb.dbcompat:              168820736 ; 0x0e0: 0x0a100000
kfdhdb.grpstmp.hi:             32967790 ; 0x0e4: HOUR=0xe DAYS=0x3 MNTH=0x3 YEAR=0x7dc
kfdhdb.grpstmp.lo:           2015746048 ; 0x0e8: USEC=0x0 MSEC=0x176 SECS=0x2 MINS=0x1e
kfdhdb.vfstart:                       0 ; 0x0ec: 0x00000000

后续处理

--导入kfed
[grid@rac1 ~]$ kfed merge /dev/oracleasm/disks/VOL3 text=vol3.txt

--MOUNT diskgroup
SQL> alter diskgroup xifenfei mount;

Diskgroup altered.

ASM DISK HEADER 备份与恢复

Posted on 2012 年 04 月 17 日 by 惜分飞

最近遇到几次ASM DATA HEADER出问题导致DISK GROUP 不能正常的MOUNT,是的数据库不能正常工作,从来带来了无穷的麻烦,这个时候心想,如果我做了ASM DATA HEADER的备份该多好啊,可惜世上没有后悔药,建议大家检查下自己的ASM库,ASM HEADER是否已经做了备份,如果没有请及时处理下.这里试验提供了dd和kfed备份和恢复ASM HEADER
查询ASM相关信息

SQL> select group_number,name,state,total_mb,free_mb from v$asm_diskgroup;

GROUP_NUMBER NAME                           STATE        TOTAL_MB    FREE_MB
------------ ------------------------------ ---------- ---------- ----------
           1 DATA                           MOUNTED          2046       1314
           2 XIFENFEI                       MOUNTED          6141       4378

SQL> select group_number,DISK_NUMBER,PATH,STATE from v$asm_disk;

GROUP_NUMBER DISK_NUMBER PATH                           STATE
------------ ----------- ------------------------------ ----------------
           1           1 /dev/oracleasm/disks/VOL2      NORMAL
           1           0 /dev/oracleasm/disks/VOL1      NORMAL
           2           1 /dev/oracleasm/disks/VOL4      NORMAL
           2           0 /dev/oracleasm/disks/VOL3      NORMAL

找出ASM DISK对应磁盘分区

[grid@rac1 ~]$ /etc/init.d/oracleasm  querydisk -d VOL1
Disk "VOL1" is a valid ASM disk on device [8,33]
[grid@rac1 ~]$ ll /dev |grep 8|grep 33
brw-r----- 1 root disk     8,  33 Apr 17 11:37 sdc1
[grid@rac1 ~]$ /etc/init.d/oracleasm  querydisk -d VOL2
Disk "VOL2" is a valid ASM disk on device [8,34]
[grid@rac1 ~]$ ll /dev |grep 8|grep 34
brw-r----- 1 root disk     8,  34 Apr 17 11:37 sdc2
[grid@rac1 ~]$ /etc/init.d/oracleasm  querydisk -d VOL3
Disk "VOL3" is a valid ASM disk on device [8,17]
[grid@rac1 ~]$ ll /dev |grep 8,|grep 17
brw-r----- 1 root disk     8,  17 Apr 17 11:37 sdb1
[grid@rac1 ~]$ /etc/init.d/oracleasm  querydisk -d VOL4
Disk "VOL4" is a valid ASM disk on device [8,18]
[grid@rac1 ~]$ ll /dev |grep 8,|grep 18
brw-r----- 1 root disk     8,  18 Apr 17 11:37 sdb2

备份ASM HEADER信息(备份XIFENFEI磁盘组)

--dd方式备份
[root@rac1 backup_asmheader]# dd if=/dev/sdb1 of=vol3header.dd bs=4096 count=1
1+0 records in
1+0 records out
4096 bytes (4.1 kB) copied, 0.000143581 seconds, 28.5 MB/s
[root@rac1 backup_asmheader]# dd if=/dev/sdb2 of=vol4header.dd bs=4096 count=1
1+0 records in
1+0 records out
4096 bytes (4.1 kB) copied, 0.000147727 seconds, 27.7 MB/s

--kfed方式备份
[grid@rac1 backup_asmheader]$ kfed read /dev/oracleasm/disks/VOL3 text=vol3header.txt
[grid@rac1 backup_asmheader]$ more vol3header.txt 
kfbh.endian:                          1 ; 0x000: 0x01
kfbh.hard:                          130 ; 0x001: 0x82
kfbh.type:                            1 ; 0x002: KFBTYP_DISKHEAD
kfbh.datfmt:                          1 ; 0x003: 0x01
kfbh.block.blk:                       0 ; 0x004: blk=0
kfbh.block.obj:              2147483648 ; 0x008: disk=0
kfbh.check:                   198826195 ; 0x00c: 0x0bd9d8d3
kfbh.fcn.base:                        0 ; 0x010: 0x00000000
kfbh.fcn.wrap:                        0 ; 0x014: 0x00000000
kfbh.spare1:                          0 ; 0x018: 0x00000000
kfbh.spare2:                          0 ; 0x01c: 0x00000000
kfdhdb.driver.provstr:     ORCLDISKVOL3 ; 0x000: length=12
kfdhdb.driver.reserved[0]:    860639062 ; 0x008: 0x334c4f56
kfdhdb.driver.reserved[1]:            0 ; 0x00c: 0x00000000
kfdhdb.driver.reserved[2]:            0 ; 0x010: 0x00000000
kfdhdb.driver.reserved[3]:            0 ; 0x014: 0x00000000
kfdhdb.driver.reserved[4]:            0 ; 0x018: 0x00000000
kfdhdb.driver.reserved[5]:            0 ; 0x01c: 0x00000000
kfdhdb.compat:                186646528 ; 0x020: 0x0b200000
kfdhdb.dsknum:                        0 ; 0x024: 0x0000
kfdhdb.grptyp:                        1 ; 0x026: KFDGTP_EXTERNAL
kfdhdb.hdrsts:                        3 ; 0x027: KFDHDR_MEMBER
kfdhdb.dskname:           XIFENFEI_0000 ; 0x028: length=13
kfdhdb.grpname:                XIFENFEI ; 0x048: length=8
kfdhdb.fgname:            XIFENFEI_0000 ; 0x068: length=13
kfdhdb.capname:                         ; 0x088: length=0
kfdhdb.crestmp.hi:             32967790 ; 0x0a8: HOUR=0xe DAYS=0x3 MNTH=0x3 YEAR=0x7dc
kfdhdb.crestmp.lo:           2015933440 ; 0x0ac: USEC=0x0 MSEC=0x22d SECS=0x2 MINS=0x1e
kfdhdb.mntstmp.hi:             32969259 ; 0x0b0: HOUR=0xb DAYS=0x11 MNTH=0x4 YEAR=0x7dc
kfdhdb.mntstmp.lo:           2707277824 ; 0x0b4: USEC=0x0 MSEC=0x372 SECS=0x15 MINS=0x28
kfdhdb.secsize:                     512 ; 0x0b8: 0x0200
kfdhdb.blksize:                    4096 ; 0x0ba: 0x1000
kfdhdb.ausize:                  1048576 ; 0x0bc: 0x00100000
kfdhdb.mfact:                    113792 ; 0x0c0: 0x0001bc80
kfdhdb.dsksize:                    2353 ; 0x0c4: 0x00000931
kfdhdb.pmcnt:                         2 ; 0x0c8: 0x00000002
kfdhdb.fstlocn:                       1 ; 0x0cc: 0x00000001
kfdhdb.altlocn:                       2 ; 0x0d0: 0x00000002
kfdhdb.f1b1locn:                      2 ; 0x0d4: 0x00000002
kfdhdb.redomirrors[0]:                0 ; 0x0d8: 0x0000
kfdhdb.redomirrors[1]:                0 ; 0x0da: 0x0000
kfdhdb.redomirrors[2]:                0 ; 0x0dc: 0x0000
kfdhdb.redomirrors[3]:                0 ; 0x0de: 0x0000
kfdhdb.dbcompat:              168820736 ; 0x0e0: 0x0a100000
kfdhdb.grpstmp.hi:             32967790 ; 0x0e4: HOUR=0xe DAYS=0x3 MNTH=0x3 YEAR=0x7dc
kfdhdb.grpstmp.lo:           2015746048 ; 0x0e8: USEC=0x0 MSEC=0x176 SECS=0x2 MINS=0x1e
kfdhdb.vfstart:                       0 ; 0x0ec: 0x00000000
kfdhdb.vfend:                         0 ; 0x0f0: 0x00000000
kfdhdb.spfile:                        0 ; 0x0f4: 0x00000000
kfdhdb.spfflg:                        0 ; 0x0f8: 0x00000000
kfdhdb.ub4spare[0]:                   0 ; 0x0fc: 0x00000000
kfdhdb.ub4spare[1]:                   0 ; 0x100: 0x00000000
kfdhdb.ub4spare[2]:                   0 ; 0x104: 0x00000000
kfdhdb.ub4spare[3]:                   0 ; 0x108: 0x00000000
kfdhdb.ub4spare[4]:                   0 ; 0x10c: 0x00000000
kfdhdb.ub4spare[5]:                   0 ; 0x110: 0x00000000
kfdhdb.ub4spare[6]:                   0 ; 0x114: 0x00000000
kfdhdb.ub4spare[7]:                   0 ; 0x118: 0x00000000
kfdhdb.ub4spare[8]:                   0 ; 0x11c: 0x00000000
kfdhdb.ub4spare[9]:                   0 ; 0x120: 0x00000000
kfdhdb.ub4spare[10]:                  0 ; 0x124: 0x00000000
kfdhdb.ub4spare[11]:                  0 ; 0x128: 0x00000000
kfdhdb.ub4spare[12]:                  0 ; 0x12c: 0x00000000
kfdhdb.ub4spare[13]:                  0 ; 0x130: 0x00000000
kfdhdb.ub4spare[14]:                  0 ; 0x134: 0x00000000
kfdhdb.ub4spare[15]:                  0 ; 0x138: 0x00000000
kfdhdb.ub4spare[16]:                  0 ; 0x13c: 0x00000000
kfdhdb.ub4spare[17]:                  0 ; 0x140: 0x00000000
kfdhdb.ub4spare[18]:                  0 ; 0x144: 0x00000000
kfdhdb.ub4spare[19]:                  0 ; 0x148: 0x00000000
kfdhdb.ub4spare[20]:                  0 ; 0x14c: 0x00000000
kfdhdb.ub4spare[21]:                  0 ; 0x150: 0x00000000
kfdhdb.ub4spare[22]:                  0 ; 0x154: 0x00000000
kfdhdb.ub4spare[23]:                  0 ; 0x158: 0x00000000
kfdhdb.ub4spare[24]:                  0 ; 0x15c: 0x00000000
kfdhdb.ub4spare[25]:                  0 ; 0x160: 0x00000000
kfdhdb.ub4spare[26]:                  0 ; 0x164: 0x00000000
kfdhdb.ub4spare[27]:                  0 ; 0x168: 0x00000000
kfdhdb.ub4spare[28]:                  0 ; 0x16c: 0x00000000
kfdhdb.ub4spare[29]:                  0 ; 0x170: 0x00000000
kfdhdb.ub4spare[30]:                  0 ; 0x174: 0x00000000
kfdhdb.ub4spare[31]:                  0 ; 0x178: 0x00000000
kfdhdb.ub4spare[32]:                  0 ; 0x17c: 0x00000000
kfdhdb.ub4spare[33]:                  0 ; 0x180: 0x00000000
kfdhdb.ub4spare[34]:                  0 ; 0x184: 0x00000000
kfdhdb.ub4spare[35]:                  0 ; 0x188: 0x00000000
kfdhdb.ub4spare[36]:                  0 ; 0x18c: 0x00000000
kfdhdb.ub4spare[37]:                  0 ; 0x190: 0x00000000
kfdhdb.ub4spare[38]:                  0 ; 0x194: 0x00000000
kfdhdb.ub4spare[39]:                  0 ; 0x198: 0x00000000
kfdhdb.ub4spare[40]:                  0 ; 0x19c: 0x00000000
kfdhdb.ub4spare[41]:                  0 ; 0x1a0: 0x00000000
kfdhdb.ub4spare[42]:                  0 ; 0x1a4: 0x00000000
kfdhdb.ub4spare[43]:                  0 ; 0x1a8: 0x00000000
kfdhdb.ub4spare[44]:                  0 ; 0x1ac: 0x00000000
kfdhdb.ub4spare[45]:                  0 ; 0x1b0: 0x00000000
kfdhdb.ub4spare[46]:                  0 ; 0x1b4: 0x00000000
kfdhdb.ub4spare[47]:                  0 ; 0x1b8: 0x00000000
kfdhdb.ub4spare[48]:                  0 ; 0x1bc: 0x00000000
kfdhdb.ub4spare[49]:                  0 ; 0x1c0: 0x00000000
kfdhdb.ub4spare[50]:                  0 ; 0x1c4: 0x00000000
kfdhdb.ub4spare[51]:                  0 ; 0x1c8: 0x00000000
kfdhdb.ub4spare[52]:                  0 ; 0x1cc: 0x00000000
kfdhdb.ub4spare[53]:                  0 ; 0x1d0: 0x00000000
kfdhdb.acdb.aba.seq:                  0 ; 0x1d4: 0x00000000
kfdhdb.acdb.aba.blk:                  0 ; 0x1d8: 0x00000000
kfdhdb.acdb.ents:                     0 ; 0x1dc: 0x0000
kfdhdb.acdb.ub2spare:                 0 ; 0x1de: 0x0000
[grid@rac1 backup_asmheader]$ kfed read /dev/oracleasm/disks/VOL4 text=vol4header.txt

破坏VOL3 ASM磁盘

[root@rac1 backup_asmheader]# dd if=/dev/zero of=/dev/sdb1 bs=4096 count=1
1+0 records in
1+0 records out
4096 bytes (4.1 kB) copied, 0.00165264 seconds, 2.5 MB/s

[grid@rac1 backup_asmheader]$ kfed read /dev/oracleasm/disks/VOL3
kfbh.endian:                          0 ; 0x000: 0x00
kfbh.hard:                            0 ; 0x001: 0x00
kfbh.type:                            0 ; 0x002: KFBTYP_INVALID
kfbh.datfmt:                          0 ; 0x003: 0x00
kfbh.block.blk:                       0 ; 0x004: blk=0
kfbh.block.obj:                       0 ; 0x008: file=0
kfbh.check:                           0 ; 0x00c: 0x00000000
kfbh.fcn.base:                        0 ; 0x010: 0x00000000
kfbh.fcn.wrap:                        0 ; 0x014: 0x00000000
kfbh.spare1:                          0 ; 0x018: 0x00000000
kfbh.spare2:                          0 ; 0x01c: 0x00000000
B4BFE200 00000000 00000000 00000000 00000000  [................]
  Repeat 255 times
KFED-00322: Invalid content encountered during block traversal: [kfbtTraverseBlock][Invalid OSM block type][][0]

启动ASM

[grid@rac1 backup_asmheader]$ sqlplus / as sysoper

SQL*Plus: Release 11.2.0.3.0 Production on Tue Apr 17 12:29:42 2012

Copyright (c) 1982, 2011, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup
ASM instance started
ORA-15032: not all alterations performed
ORA-15017: diskgroup "XIFENFEI" cannot be mounted
ORA-15063: ASM discovered an insufficient number of disks for diskgroup
"XIFENFEI"

恢复ASM DATE HEADER

--dd 恢复
[root@rac1 backup_asmheader]# dd if=vol3header.dd of=/dev/sdb1 bs=4096 count=1
1+0 records in
1+0 records out
4096 bytes (4.1 kB) copied, 0.00197913 seconds, 2.1 MB/s

--kfed 恢复
[grid@rac1 backup_asmheader]$ kfed merge /dev/oracleasm/disks/VOL3 text=vol3header.txt

MOUNT DISKGROUP

SQL> alter diskgroup xifenfei mount;

Diskgroup altered.

13429648788

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Category Archives: Oracle ASM

ASM未正常启动,使用dd找回数据文件

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手工修复ASM DISK HEADER 异常

ASM DISK HEADER 备份与恢复