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有朋友在aix环境对其中一个rac的asm磁盘组进行扩容
之后另外一套rac的磁盘组直接dismount
Wed Aug 23 12:44:02 2023 NOTE: SMON starting instance recovery for group DATA domain 2 (mounted) NOTE: F1X0 found on disk 0 au 2 fcn 0.128808679 NOTE: SMON skipping disk 7 - no header NOTE: cache initiating offline of disk 7 group DATA NOTE: process _smon_+asm1 (1770932) initiating offline of disk 7.3422955792 (DATA_0007) with mask 0x7e in group 2 NOTE: initiating PST update: grp = 2, dsk = 7/0xcc062910, mask = 0x6a, op = clear Wed Aug 23 12:44:02 2023 GMON updating disk modes for group 2 at 7 for pid 17, osid 1770932 ERROR: Disk 7 cannot be offlined, since diskgroup has external redundancy. ERROR: too many offline disks in PST (grp 2) Wed Aug 23 12:44:02 2023 NOTE: cache dismounting (not clean) group 2/0x7FE6D808 (DATA) WARNING: Offline for disk DATA_0007 in mode 0x7f failed. Wed Aug 23 12:44:02 2023 NOTE: halting all I/Os to diskgroup 2 (DATA) ERROR: No disks with F1X0 found on disk group DATA NOTE: aborting instance recovery of domain 2 due to diskgroup dismount NOTE: SMON skipping lock domain (2) validation because diskgroup being dismounted Abort recovery for domain 2 Wed Aug 23 12:44:02 2023 ERROR: ORA-15130 in COD recovery for diskgroup 2/0x7fe6d808 (DATA) ERROR: ORA-15130 thrown in RBAL for group number 2 Errors in file /u01/app/grid/diag/asm/+asm/+ASM1/trace/+ASM1_rbal_2360526.trc: ORA-15130: diskgroup "DATA" is being dismounted
再次尝试mount该磁盘组,报ORA-15042和ORA-15038错误
SQL> alter diskgroup data mount NOTE: cache registered group DATA number=2 incarn=0x79e6d861 NOTE: cache began mount (first) of group DATA number=2 incarn=0x79e6d861 NOTE: Assigning number (2,0) to disk (/dev/rhdisk31) NOTE: Assigning number (2,3) to disk (/dev/rhdisk33) NOTE: Assigning number (2,4) to disk (/dev/rhdisk34) NOTE: Assigning number (2,5) to disk (/dev/rhdisk35) NOTE: Assigning number (2,6) to disk (/dev/rhdisk36) NOTE: Assigning number (2,9) to disk (/dev/rhdisk39) NOTE: Assigning number (2,1) to disk (/dev/rhdisk8) NOTE: Assigning number (2,2) to disk (/dev/rhdisk9) Wed Aug 23 12:58:46 2023 NOTE: GMON heartbeating for grp 2 GMON querying group 2 at 11 for pid 27, osid 3736034 NOTE: Assigning number (2,7) to disk () NOTE: Assigning number (2,8) to disk () GMON querying group 2 at 12 for pid 27, osid 3736034 NOTE: cache dismounting (clean) group 2/0x79E6D861 (DATA) NOTE: messaging CKPT to quiesce pins Unix process pid: 3736034, image: oracle@hbbz01 (TNS V1-V3) NOTE: dbwr not being msg'd to dismount NOTE: lgwr not being msg'd to dismount NOTE: cache dismounted group 2/0x79E6D861 (DATA) NOTE: cache ending mount (fail) of group DATA number=2 incarn=0x79e6d861 NOTE: cache deleting context for group DATA 2/0x79e6d861 GMON dismounting group 2 at 13 for pid 27, osid 3736034 NOTE: Disk DATA_0000 in mode 0x7f marked for de-assignment NOTE: Disk DATA_0001 in mode 0x7f marked for de-assignment NOTE: Disk DATA_0002 in mode 0x7f marked for de-assignment NOTE: Disk DATA_0003 in mode 0x7f marked for de-assignment NOTE: Disk DATA_0004 in mode 0x7f marked for de-assignment NOTE: Disk DATA_0005 in mode 0x7f marked for de-assignment NOTE: Disk DATA_0006 in mode 0x7f marked for de-assignment NOTE: Disk in mode 0x7f marked for de-assignment NOTE: Disk in mode 0x7f marked for de-assignment NOTE: Disk DATA_0009 in mode 0x7f marked for de-assignment ERROR: diskgroup DATA was not mounted ORA-15032: not all alterations performed ORA-15040: diskgroup is incomplete ORA-15042: ASM disk "8" is missing from group number "2" ORA-15042: ASM disk "7" is missing from group number "2" ORA-15038: disk '/dev/rhdisk37' mismatch on 'Time Stamp' with target disk group [2129689239] [2062898314] ERROR: alter diskgroup data mount
怀疑把报错这个磁盘组的rhdisk37加入到另外一套rac的asm中了(也就是说两套asm使用了同一块磁盘)，aix操作系统层面分析确认
---对asm扩容的机器上
# lscfg -vpl hdisk15
hdisk15 U78C5.001.DQD076A-P2-C4-T1-W200C00A098BC9A83-L0 MPIO NetApp FCP Default PCM Disk
Manufacturer................NETAPP
Machine Type and Model......LUN C-Mode
ROS Level and ID............9000
Serial Number...............80DYz]L/OpCA
Device Specific.(Z0)........FAS8020
PLATFORM SPECIFIC
Name: disk
Node: disk
Device Type: block
---磁盘组dismount的机器上
# lscfg -vpl hdisk37
hdisk37 U5802.001.9K87776-P1-C1-T1-W200500A098BC9A83-L0 MPIO NetApp FCP Default PCM Disk
Manufacturer................NETAPP
Machine Type and Model......LUN C-Mode
ROS Level and ID............9000
Serial Number...............80DYz]L/OpCA
Device Specific.(Z0)........FAS8020
PLATFORM SPECIFIC
Name: disk
Node: disk
Device Type: block
通过lscfg 命令确认两套rac使用了同一块盘导致一个磁盘组异常，在新加的机器上查询确认新盘被破坏情况(新加入的磁盘由于reblance操作,已经被写入了380G左右数据[也就意味着这个磁盘在老磁盘组中最少会丢失380G数据]
对于这种情况，dismount磁盘组是外部冗余不可能直接mount起来,只能通过以前处理的类似方法:
asm disk header 彻底损坏恢复
asm磁盘加入vg恢复
asm磁盘dd破坏恢复
asm disk 磁盘部分被清空恢复
再一例asm disk被误加入vg并且扩容lv恢复
fdisk分区导致asm disk破坏数据库恢复
再一起asm disk被格式化成ext3文件系统故障恢复
oracle asm disk格式化恢复—格式化为ext4文件系统
oracle asm disk格式化恢复—格式化为ntfs文件系统
ORA-15063: ASM discovered an insufficient number of disks for diskgroup 恢复
通过底层处理恢复出来没有覆盖的数据块中数据
再使用dul恢复出来其中数据,完成这次故障的核心数据恢复
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