Got a page.. something like “Fault found by metastat” in short description in Remedy…

# metastat | grep Need
State: Needs maintenance
State: Needs maintenance

Which disk?

# metastat d9
d9: Mirror
Submirror 0: d19
State: Needs maintenance
Submirror 1: d29
State: Okay
Pass: 1
Read option: roundrobin (default)
Write option: parallel (default)
Size: 134221440 blocks (64 GB)

Device Relocation Information:
Device Reloc Device ID
c0t2d0 Yes id1,sd@SSEAGATE_ST373307LSUN72G_3HZ6Y1EN000074312CVW
c0t3d0 Yes id1,sd@SSEAGATE_ST373307LSUN72G_3HZ6Y46Y0000743249BK


Check for hard errors to verify if this disk can really be replaced… if it passed (on your criteria), you can try re-syncing it…

c# metareplace -e d9 c0t2d0s5
d9: device c0t2d0s5 is enabled

Verify that it’s doing what it is expected..

# metastat d9
d9: Mirror
Submirror 0: d19
State: Resyncing
Submirror 1: d29
State: Okay
Resync in progress: 0 % done
Pass: 1
Read option: roundrobin (default)
Write option: parallel (default)
Size: 134221440 blocks (64 GB)

And we wait…..

Yesterday we had to replace a failed disk that belongs to a mirror. The disk is running in a Sparc Solaris 10 box. It’s a 72GB from Fujitsu

c1t1d0           Soft Errors: 440 Hard Errors: 12 Transport Errors: 124
Vendor: FUJITSU  Product: MAY2073RCSUN72G  Revision: 0501 Serial No: 0711S0935R
Size: 73.40GB <73400057856 bytes>

As you can see from the iostat -En command, the disk is spitting hard errors and must be replaced before it can cause a lot more headache. It’s in c1t1, right.

Here’s what we’re supposed to do:

• we could delete the meta data base that corresponds to the failed disk
• detached the failed disk/slices to the mirror
• clear it
• unconfigure the disk
• replace the disk
• configure the disk
• create new meta device database
• Initialize the disk
• Attached it to mirror
• and sync

Here’s the detailed job:

Info:
metadb | grep c1t1
metadb –d c1t1d0s7

Detach:
metadetach d30 d32
metadetach d40 d42
metadetach d20 d22
metadetach d10 d12

metaclear d32
metaclear d42
metaclear d22
metaclear d12

Verify:
metastat -p | grep c1t1d0
metadb | grep c1t1d0
[root@localhost] /> cfgadm -al
Ap_Id Type Receptacle Occupant Condition
c0 scsi-bus connected configured unknown
c0::dsk/c0t0d0 CD-ROM connected configured unknown
c1 scsi-bus connected configured unknown
c1::dsk/c1t0d0 disk connected configured unknown
c1::dsk/c1t1d0 disk connected configured unknown
c1::dsk/c1t2d0 disk connected configured unknown
c1::dsk/c1t3d0 disk connected configured unknown
usb0/1 unknown empty unconfigured ok
usb0/2 unknown empty unconfigured ok
usb1/1.1 unknown empty unconfigured ok
usb1/1.2 unknown empty unconfigured ok
usb1/1.3 unknown empty unconfigured ok
usb1/1.4 unknown empty unconfigured ok
usb1/2 unknown empty unconfigured ok

Unconfigure:
cfgadm -c unconfigure c1::dsk/c1t1d0

Verify ulit, note the red text above:
cfgadm –al
SWAP DISK

Undo what has been done….

Configure:
cfgadm -c configure c1::dsk/c1t1d0

format (to label disk)

prtvtoc /dev/rdsk/c1t0d0s2 | fmthard -s – /dev/rdsk/c1t1d0s2

metadb -a –c 2 c1t1d0s7

Attach!!

metainit d32 1 1 c1t1d0s6
metainit d42 1 1 c1t1d0s4
metainit d22 1 1 c1t1d0s1
metainit d12 1 1 c1t1d0s0
metattach d30 d32
metattach d40 d42
metattach d20 d22
metattach d10 d12
metastat -p
metadevadm -u c1t1d0

And you’re done! Grab a cup of coffee and wait till the synchronization is done.