hapig
奇怪的镜像问题
在一台F4800上查看metastat -t的输出如下：
d1: Mirror
Submirror 0: d11
State: Needs maintenance Tue Jan 15 19:31:24 2008
Submirror 1: d21
State: Needs maintenance Tue Jan 15 23:20:51 2008
Pass: 1
Read option: roundrobin (default)
Write option: parallel (default)
Size: 71455872 blocks (34 GB)
d11: Submirror of d1
State: Needs maintenance Tue Jan 15 19:31:24 2008
Invoke: metasync d1
Size: 71455872 blocks (34 GB)
Stripe 0:
Device Start Dbase State Reloc Hot Spare Time
c0t0d0s1 0 No Okay Yes Tue Jan 15 19:30:45 2008
d21: Submirror of d1
State: Needs maintenance Tue Jan 15 23:20:51 2008
Invoke: metasync d1
Size: 71455872 blocks (34 GB)
Stripe 0:
Device Start Dbase State Reloc Hot Spare Time
c0t1d0s1 0 No Okay Yes Tue Jan 15 19:31:05 2008
d0: Mirror
Submirror 0: d10
State: Needs maintenance Tue Jan 15 19:31:16 2008
Submirror 1: d20
State: Needs maintenance Tue Jan 15 23:20:57 2008
Pass: 1
Read option: roundrobin (default)
Write option: parallel (default)
Size: 71689920 blocks (34 GB)
d10: Submirror of d0
State: Needs maintenance Tue Jan 15 19:31:16 2008
Invoke: metasync d0
Size: 71689920 blocks (34 GB)
Stripe 0:
Device Start Dbase State Reloc Hot Spare Time
c0t0d0s0 0 No Okay Yes Tue Jan 15 19:30:32 2008
d20: Submirror of d0
State: Needs maintenance Tue Jan 15 23:20:57 2008
Invoke: metasync d0
Size: 71689920 blocks (34 GB)
Stripe 0:
Device Start Dbase State Reloc Hot Spare Time
c0t1d0s0 0 No Okay Yes Tue Jan 15 19:30:55 2008
Device Relocation Information:
Device Reloc Device ID
c0t1d0 Yes id1,sd@THITACHI_DK32EJ-72NC_____415D2328
c0t0d0 Yes id1,sd@THITACHI_DK32EJ-72NC_____415C4966
d0 d1的子镜状态都是Needs maintenance，为何它们的设备状态是Okay的？子镜需要维护这是什么原因做成的，如果按照它提示的执行metasync d0,metasync d1有没有风险？