停電導致aix檔案系統掛載問題

今天機房停電了，ups供電能力不足，於是把一個陣列關掉了，當然最後也沒撐住，伺服器還是掛了。

後來供電正常了，伺服器正常了，卻發現有關檔案系統沒找到，原來那個陣列沒起來。

於是先執行mount，提示裝置不存在。

於是lsvg檢視，找出對應得vg

lsvg xxvg提示需要varyon

於是執行varyonvg，提示The volume group cannot be varied on because
        there are no good copies of the descriptor area

查詢資料得時候看到有人提示exportvg，然後importvg就好了

於是不知死活的就執行了exportvg

結果執行importvg的時候提示

0516-082 lqueryvg: Unable to access a special device file.
         Execute redefinevg and synclvodm to build correct environment.
0516-082 lqueryvg: Unable to access a special device file.
         Execute redefinevg and synclvodm to build correct environment.
0516-1140 importvg: Unable to read the volume group descriptor area
        on specified physical volume.

試著執行importvg -y vgname hdiskxx

提示0516-024 lqueryvg: Unable to open physical volume.
        Either PV was not configured or could not be opened. Run
        diagnostics.
0516-024 lqueryvg: Unable to open physical volume.
        Either PV was not configured or could not be opened. Run
        diagnostics.
0516-1140 importvg: Unable to read the volume group descriptor area
        on specified physical volume.

傻眼了，再嘗試 varyonvg backupvg
0516-008 varyonvg: LVM system call returned an unknown
        error code (3).

根據前面的提示執行redefinevg -d hdisk2 backupvg
0516-024 : Unable to open physical volume.
        Either PV was not configured or could not be opened. Run
        diagnostics.
執行synclvodm -P -v backupvg
0516-306 : Unable to find volume group backupvg in the Device
        Configuration Database.
0516-502 synclvodm: Unable to access volume group backupvg.
# lqueryvg -Atp hdisk2
0516-320 lqueryvg: Physical volume hdisk2 is not assigned to
        a volume group.
0516-024 lqueryvg: Unable to open physical volume.
        Either PV was not configured or could not be opened. Run
        diagnostics.

高手說只能重建vg。

後來檢視lspv發現pv沒了，就lsdev -Cc disk

發現

hdiskxx  Defined   11-08-L      SSA Logical Disk Drive

執行cfgmgr

然後lsdev -Cc disk發現硬體正常了。

於是執行importvg backupvg
0516-082 lqueryvg: Unable to access a special device file.
         Execute redefinevg and synclvodm to build correct environment.
0516-082 lqueryvg: Unable to access a special device file.
         Execute redefinevg and synclvodm to build correct environment.
0516-1140 importvg: Unable to read the volume group descriptor area
        on specified physical volume.
於是再執行importvg -y bakcupvg hdisk2

經過忐忑的等待，搞定！

然後mount

哇卡卡，運氣真好，資料都在

。。。。。。。。。。。。。。。。。。。。。。。。。。。。。

經驗教訓

1.不熟悉的命令不能亂用

2.exportvg之後pv也被刪了，不知道為啥

3.遇事不要慌，吉人自有天相