我想知道ASM管理的磁盘header信息丢失的时候，如何数据恢复。
我试着用事先备份的磁盘头文件dd回来，VOL2和VOL4磁盘头信息是对了，但是ASM还是无法加载ORCL_DATA1磁盘组，执行alter diskgroup ORCL_DATA1 mount报错：
ORA-15032: not all alterations performed
ORA-15063: ASM discovered an insufficient number of disks for diskgroup "ORCL_DATA1"
昨天出现的问题，oracle10g RAC，两个节点，可能是ASM的bug导致的数据库无法访问VOL2,VOL4分区，进而磁盘组ORCL_DATA1无法挂载。
alert日志显示：
Tue Dec 30 18:11:00 2008
Reread from mirror side 'VOL2' returns corrupted data
Reread from mirror side 'VOL4' returns corrupted data
用kfed工具发现这两个分区磁盘头信息已经损坏。
恢复磁盘头时，我orcl1上执行的
#dd if=/u01/app/oracle/asmdiskheader/VOL2 of=/dev/oracleasm/disks/VOL2 bs=4096 count=1
#dd if=/u01/app/oracle/asmdiskheader/VOL4 of=/dev/oracleasm/disks/VOL4 bs=4096 count=1
我以为这样就可以了，然后$export ORACLE_SID=+ASM1;sqlplus / as sysdba，启动磁盘组ORCL_DATA1没成功。我把两台机器同时重启也不行，重启之后的一些sql查询如下：
SQL> select group_number,disk_number,path,STATE,REDUNDANCY,TOTAL_MB,FREE_MB,NAME,FAILGROUP from v$asm_disk;
GROUP_NUMBER DISK_NUMBER PATH
STATE REDUNDANCY TOTAL_MBFREE_MB NAME
FAILGROUP
------------ ----------- -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ---------------- -------------- ---------- ---------- ------------------------------------------------------------ ------------------------------------------------------------
0 0 ORCL:VOL2
NORMALUNKNOWN 6588415
0
0 1 ORCL:VOL4
NORMALUNKNOWN 6588415
0
1 0 ORCL:VOL1
NORMALUNKNOWN 10219521021597 VOL1
VOL1
1 1 ORCL:VOL3
NORMALUNKNOWN 10239991023644 VOL3
VOL3
SQL> select group_number , name , state , type , offline_disks from v$asm_diskgroup;
GROUP_NUMBER NAME
STATE
TYPE OFFLINE_DISKS
------------ ------------------------------------------------------------ ---------------------- ------------ -------------
1 FLASH_RECOVERY_AREA
MOUNTED
NORMAL
0
0 ORCL_DATA1
DISMOUNTED
0
ASM的alert日志如下：
Wed Dec 31 14:00:00 2008
Instance terminated by LMON, pid = 30099
Wed Dec 31 14:10:28 2008
Starting ORACLE instance (normal)
LICENSE_MAX_SESSION = 0
LICENSE_SESSIONS_WARNING = 0
Interface type 1 eth1 172.16.0.0 configured from OCR for use as a cluster interconnect
Interface type 1 eth0 10.134.64.0 configured from OCR for use asa public interface
Picked latch-free SCN scheme 1
Using LOG_ARCHIVE_DEST_1 parameter default value as /u01/app/oracle/product/10.2.0/db_1/dbs/arch
Autotune of undo retention is turned off.
LICENSE_MAX_USERS = 0
SYS auditing is disabled
ksdpec: called for event 13740 prior to event group initialization
Starting up ORACLE RDBMS Version: 10.2.0.1.0.
System parameters with non-default values:
large_pool_size
= 12582912
spfile
= /u02/oradata/orcl/dbs/spfile+ASM.ora
instance_type
= asm
cluster_database = TRUE
instance_number
= 2
remote_login_passwordfile= EXCLUSIVE
background_dump_dest = /u01/app/oracle/admin/+ASM/bdump
user_dump_dest = /u01/app/oracle/admin/+ASM/udump
core_dump_dest = /u01/app/oracle/admin/+ASM/cdump
asm_diskgroups = ORCL_DATA1, FLASH_RECOVERY_AREA
Cluster communication is configured to use the following interface(s) for this instance
172.16.0.2
Wed Dec 31 14:10:28 2008
cluster interconnect IPC version:Oracle UDP/IP
IPC Vendor 1 proto 2
PMON started with pid=2, OS id=8456
DIAG started with pid=3, OS id=8458
PSP0 started with pid=4, OS id=8460
LMON started with pid=5, OS id=8462
LMD0 started with pid=6, OS id=8464
LMS0 started with pid=7, OS id=8470
MMAN started with pid=8, OS id=8495
DBW0 started with pid=9, OS id=8497
LGWR started with pid=10, OS id=8499
CKPT started with pid=11, OS id=8501
SMON started with pid=12, OS id=8503
RBAL started with pid=13, OS id=8505
GMON started with pid=14, OS id=8507
Wed Dec 31 14:10:29 2008
lmon registered with NM - instance id 2 (internal mem no 1)
Wed Dec 31 14:10:29 2008
Reconfiguration started (old inc 0, new inc 1)
ASM instance
pseudo shared rm latch used
List of nodes:
1
Global Resource Directory frozen
Communication channels reestablished
Master broadcasted resource hash value bitmaps
Non-local Process blocks cleaned out
Wed Dec 31 14:10:29 2008
LMS 0: 0 GCS shadows cancelled, 0 closed
Set master node info
Submitted all remote-enqueue requests
Dwn-cvts replayed, VALBLKs dubious
All grantable enqueues granted
Post SMON to start 1st pass IR
Wed Dec 31 14:10:29 2008
LMS 0: 0 GCS shadows traversed, 0 replayed
Wed Dec 31 14:10:29 2008
Submitted all GCS remote-cache requests
Post SMON to start 1st pass IR
Fix write in gcs resources
Reconfiguration complete
LCK0 started with pid=15, OS id=8509
Wed Dec 31 14:10:30 2008
SQL> ALTER DISKGROUP ALL MOUNT
Wed Dec 31 14:10:30 2008
NOTE: cache registered group FLASH_RECOVERY_AREA number=1 incarn=0x998878d3
NOTE: cache registered group ORCL_DATA1 number=2 incarn=0x998878d4
Wed Dec 31 14:10:30 2008
Loaded ASM Library - Generic Linux, version 2.0.2 (KABI_V2) library for asmlib interface
Wed Dec 31 14:10:30 2008
NOTE: Hbeat: instance first (grp 1)
ERROR: no PST quorum in group 2: required 2, found 0
Wed Dec 31 14:10:30 2008
NOTE: cache dismounting group 2/0x998878D4 (ORCL_DATA1)
NOTE: dbwr not being msg'd to dismount
ERROR: diskgroup ORCL_DATA1 was not mounted
Wed Dec 31 14:10:32 2008
Reconfiguration started (old inc 1, new inc 2)
List of nodes:
0 1
Global Resource Directory frozen
Communication channels reestablished
Master broadcasted resource hash value bitmaps
Non-local Process blocks cleaned out
Wed Dec 31 14:10:33 2008
LMS 0: 0 GCS shadows cancelled, 0 closed
Set master node info
Submitted all remote-enqueue requests
Dwn-cvts replayed, VALBLKs dubious
All grantable enqueues granted
Wed Dec 31 14:10:33 2008
LMS 0: 0 GCS shadows traversed, 0 replayed
Wed Dec 31 14:10:33 2008
Submitted all GCS remote-cache requests
Fix write in gcs resources
Reconfiguration complete
Wed Dec 31 14:10:35 2008
NOTE: start heartbeating (grp 1)
NOTE: cache opening disk 0 of grp 1: VOL1 label:VOL1
Wed Dec 31 14:10:35 2008
NOTE: F1X0 found on disk 0 fcn 0.0
NOTE: cache opening disk 1 of grp 1: VOL3 label:VOL3
NOTE: F1X0 found on disk 1 fcn 0.0
NOTE: cache mounting (first) group 1/0x998878D3 (FLASH_RECOVERY_AREA)
* allocate domain 1, invalid = TRUE
kjbdomatt send to node 0
Wed Dec 31 14:10:35 2008
NOTE: attached to recovery domain 1
Wed Dec 31 14:10:35 2008
NOTE: starting recovery of thread=1 ckpt=11.139
NOTE: starting recovery of thread=2 ckpt=13.41
NOTE: advancing ckpt for thread=1 ckpt=11.139
NOTE: advancing ckpt for thread=2 ckpt=13.41
NOTE: cache recovered group 1 to fcn 0.2579
Wed Dec 31 14:10:35 2008
NOTE: opening chunk 1 at fcn 0.2579 ABA
NOTE: seq=12 blk=140
Wed Dec 31 14:10:35 2008
NOTE: cache mounting group 1/0x998878D3 (FLASH_RECOVERY_AREA) succeeded
SUCCESS: diskgroup FLASH_RECOVERY_AREA was mounted
Wed Dec 31 14:10:44 2008
NOTE: recovering COD for group 1/0x998878d3 (FLASH_RECOVERY_AREA)
SUCCESS: completed COD recovery for group 1/0x998878d3 (FLASH_RECOVERY_AREA)
Wed Dec 31 14:27:34 2008
SQL> alter diskgroup ORCL_DATA1 mount
Wed Dec 31 14:27:34 2008
NOTE: cache registered group ORCL_DATA1 number=2 incarn=0x9b1878dc
Wed Dec 31 14:27:34 2008
ERROR: no PST quorum in group 2: required 2, found 0
Wed Dec 31 14:27:34 2008
NOTE: cache dismounting group 2/0x9B1878DC (ORCL_DATA1)
|
