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Replacing a failed disk using SVM

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Operating Systems Solaris Replacing a failed disk using SVM
# 8  
Old 03-15-2017
for dumpadm:
Code:
root@mhcominf01:/# dumpadm
      Dump content: kernel pages
       Dump device: /dev/md/dsk/d30 (dedicated)
Savecore directory: /var/crash/mhcominf01
  Savecore enabled: yes
   Save compressed: on

for swap -l
Code:
root@mhcominf01:/# swap -l
swapfile             dev  swaplo blocks   free
/dev/md/dsk/d20     85,20      8 20980880 20980880
root@mhcominf01:/#

when running metastat, I come across the following:
Code:
d32: Submirror of d30
    State: Needs maintenance
    Invoke: metareplace d30 c0t2d0s3 <new device>
    Size: 459940950 blocks (219 GB)
    Stripe 0:
        Device     Start Block  Dbase        State Reloc Hot Spare
        c0t2d0s3          0     No     Maintenance   Yes

,
and:

Code:
d22: Submirror of d20
    State: Needs maintenance
    Invoke: metareplace d20 c0t2d0s1 <new device>
    Size: 20980890 blocks (10 GB)
    Stripe 0:
        Device     Start Block  Dbase        State Reloc Hot Spare
        c0t2d0s1          0     No     Maintenance   Yes

these are two different stattements. What do they mean, what is the impact on the system?
Please explain
# 9  
Old 03-15-2017
Ok, it seems that c0t0d0 disk is not in use.
One check is missing:
Code:
zpool status

should not list the c0t0d0.
The next challenge is to find the physical disk that is c0t0d0.
The d30 and d20 mirrors are degraded, because the submirrors d32 and d22 failed. Obviously because the c0t2d0 disk failed. But they still work because the other submirrors are okay.
I would surface-scan the disk c0t2d0, by means of format, pick the c0t2d0, analyze, read.
If this passes without errors, I would resync them, e.g. by the commands
Code:
metareplace -e d30 c0t2d0s3
metareplace -e d20 c0t2d0s1

Then metastat should show they are resyncing (data is restored from the other submirror).
If all submirrors are okay then the full redundancy is restored, and the mirrors' state become okay.
# 10  
Old 03-15-2017
If your disk has failed completely, format would say "drive type unknown", like the c0t0d0 disk.

So at this point, you can try to resync the mirror. If it fails to complete the resync, then replace the disk.
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