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. |
--转自