Disksuite SubMirror "Needs Maintenance"

Solaris 2.6 running on a Enterprise 250 with Disksuite.

One of our mirrored disks has recently changed state to "Needs
Maintenance" in the metastat output (See below). It seems as though
the disk may have failed.

How can I confirm that it is actually a failed hard disk...?

Is there any way of finding out the date when the state changed to
"Needs Maintenance"..?

Metastat output:

d30: Mirror
Submirror 0: d10
State: Needs maintenance
Submirror 1: d20
State: Okay
Pass: 1
Read option: roundrobin (default)
Write option: parallel (default)
Size: 6144903 blocks

d10: Submirror of d30
State: Needs maintenance
Invoke: metareplace d30 /dev/dsk/c0t0d0s0 <new device>
Size: 6144903 blocks
Stripe 0:
Device Start Block Dbase State Hot Spare
/dev/dsk/c0t0d0s0 0 No Maintenance

d20: Submirror of d30
State: Okay
Size: 6144903 blocks
Stripe 0:
Device Start Block Dbase State Hot Spare
c0t8d0s0 0 No Okay


d31: Mirror
Submirror 0: d11
State: Needs maintenance
Submirror 1: d21
State: Okay
Pass: 1
Read option: roundrobin (default)
Write option: parallel (default)
Size: 1025595 blocks

d11: Submirror of d31
State: Needs maintenance
Invoke: metareplace d31 /dev/dsk/c0t0d0s1 <new device>
Size: 1025595 blocks
Stripe 0:
Device Start Block Dbase State Hot Spare
/dev/dsk/c0t0d0s1 0 No Maintenance

d21: Submirror of d31
State: Okay
Size: 1025595 blocks
Stripe 0:
Device Start Block Dbase State Hot Spare
c0t8d0s1 0 No Okay


d34: Mirror
Submirror 0: d14
State: Needs maintenance
Submirror 1: d24
State: Okay
Pass: 1
Read option: roundrobin (default)
Write option: parallel (default)
Size: 62916642 blocks

d14: Submirror of d34
State: Needs maintenance
Invoke: metareplace d34 /dev/dsk/c0t0d0s7 <new device>
Size: 62916642 blocks
Stripe 0:
Device Start Block Dbase State Hot Spare
/dev/dsk/c0t0d0s7 0 No Maintenance

d24: Submirror of d34
State: Okay
Size: 62916642 blocks
Stripe 0:
Device Start Block Dbase State Hot Spare
c0t8d0s7 0 No Okay

hsp001: is empty

Any help appreciated....

Matt

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