SDS解镜像(案例)

zhaopingzi

                          解镜像
   
         作者：　　zhaopingzi

案例：一台SUN480，两块硬盘c1t0d0s2,c1t1d0s2。文件系统/和/zcbuff用disksuite做了镜像；
c1t0d0s0和c1t1d0s0为/分区，做了镜像d1,c1t0d0s7和c1t1d0s7为/zcbuff,做了镜像d7.

#metastat d7
d7: Mirror
    Submirror 0: d17
      State: Okay
    Submirror 1: d27
      State: Okay
    Pass: 1
    Read option: roundrobin (default)
    Write option: parallel (default)
    Size: 20972736 blocks
d17: Submirror of d7
    State: Okay
    Size: 20972736 blocks
    Stripe 0:
        Device              Start Block  Dbase State        Hot Spare
        c1t0d0s7                   0     No    Okay
d27: Submirror of d7
    State: Okay
    Size: 20972736 blocks
    Stripe 0:
        Device              Start Block  Dbase State        Hot Spare
        c1t1d0s7                   0     No    Okay
# metastat d1
d1: Mirror
    Submirror 0: d11
      State: Okay
    Submirror 1: d21
      State: Okay
    Pass: 1
    Read option: roundrobin (default)
    Write option: parallel (default)
    Size: 20972736 blocks
d11: Submirror of d1
    State: Okay
    Size: 20972736 blocks
    Stripe 0:
        Device              Start Block  Dbase State        Hot Spare
        c1t0d0s0                   0     No    Okay
d21: Submirror of d1
    State: Okay
    Size: 20972736 blocks
    Stripe 0:
        Device              Start Block  Dbase State        Hot Spare
        c1t1d0s0                   0     No    Okay

以下步骤对镜像D7进行解镜像：
(1)#metadetach d7 d27
d7: submirror d27 is detached
(2)修改vfstab文件
把/dev/md/dsk/d7  /dev/md/rdsk/d7  /zcbuff ufs 2  yes -        改为
/dev/dsk/c1t0d0s7  /dev/rdsk/c1t0d0s7  /zcbuff ufs  2   yes     -
(3)重新启动机器
(4)#metaclear –r d7
  d7: Mirror is cleared
d17: Concat/Stripe is cleared
# metaclear d27
d27: Concat/Stripe is cleared
(5)解镜像成功。
以下步骤对镜像d1进行解镜像：
(1)# metadetach d1 d21
d1: submirror d21 is detached
(2) metaroot /dev/dsk/c1t0d0s0
(3)重新启动机器reboot
(4) # metaclear -r d1
d1: Mirror is cleared
d11: Concat/Stripe is cleared
(5)# metaclear d21
d21: Concat/Stripe is cleared
root@s1 #
解完成


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