PKEND021 Secondary Disk Failure Action Plan

Hi Shams, CASEID:: 11269883

Thank you for the file.

root@PKEND021 # metadb
flags first blk block count
a m p lu 16 8192 /dev/dsk/c0t0d0s7
a p l 8208 8192 /dev/dsk/c0t0d0s7
a p l 16400 8192 /dev/dsk/c0t0d0s7
M p 16 unknown /dev/dsk/c1t0d0s7
M p 8208 unknown /dev/dsk/c1t0d0s7
M p 16400 unknown /dev/dsk/c1t0d0s7

From the output, we can see all the state replica on c1t0d0 are bad.

Use the metadb command to delete them. For example:

# metadb -d c1t0d0s7

Once that is deleted, the next steps is to replaced the disk.

Part II: Replacing failed boot device

1. Gracefully power-down the system with this command:

# init 5

2. Physically replace the failed boot device.



Part III: Repairing state replica database

1. If you use Solaris[TM] Volume Manager on Solaris[TM] 9 or later,
update the state database with the device ID for the new disk using
metadevadm -u c#t#d# .

# metadevadm -u c1t0d0s7

2. Once new boot disk is repartitioned, add new working state replicas
back into the newly replaced disk drive. For example:

# metadb -a -c 3 c1t0d0s7

(The -c #; specifies how many replicas to put into the specified partition)

Part IV: Resyncing the sub-mirrors

1. Run metstat to find all the metadevices that the failed boot device
belongs to. For example:

d0: Mirror
Submirror 0: d1
State: Needs maintenance
Submirror 1: d2
State: Okay
Pass: 1
Read option: roundrobin (default)
Write option: parallel (default)
Size: 205200 blocks

d1: Submirror of d0
State: Needs maintenance
Size: 205200 blocks
Stripe 0:
Device Start Block Dbase State Hot Spare
c0t0d0s0 0 No Okay


d2: Submirror of d0
State: Okay
Size: 205200 blocks
Stripe 0:
Device Start Block Dbase State Hot Spare
c1t2d0s0 0 No Okay


2. Use the metareplace command to re-enable the sub-mirror. For example:

# metareplace -e d0 c0t0d0s0

(Resync operation may take about 15-20 minutes per every gigabyte of
filesystem)

3. Repeat metareplace command to re-enable the other sub-mirrors located
on the same disk:

# metareplace -e d c0t0d0smaintenance>

4. Reboot system to have it boot from the newly repaired boot device:

Before rebooting, wait for the resync : all metadevices must be in
'Okay' state, then :

# init 6


I will proceed to order the 146 GB disk on D240 storage.