Disk Failure?

Hi everyone,

Yesterday I had a disk fail on a SunFire 280R Solaris 8.
The questions first:
Can the experts confirm my opinion that this is a hardware problem -
disk failure?
Have you any suggestions for recovering data from this drive (I do have
backups, but I would still lose some important data)?

Thanks for any help
Richard Butler


Symptoms:
This machine had two 72G disks (not mirrored) and during reboot after
installing the latest recommended patches I get the warning:
...
Jun 14 12:06:30 ed pcisch: [ID 370704 kern.info] PCI-device: SUNW,qlc@4,
qlc0
Jun 14 12:06:30 ed genunix: [ID 936769 kern.info] qlc0 is
/pci@8,600000/SUNW,qlc@4
Jun 14 12:06:30 ed genunix: [ID 936769 kern.info] fp0 is
/pci@8,600000/SUNW,qlc@4/fp@0,0
Jun 14 12:06:31 ed genunix: [ID 405830 kern.warning] WARNING: Device
ssd0 failed to power up.
Jun 14 12:06:32 ed genunix: [ID 749148 kern.warning] WARNING: Please see
your system administrator or reboot.
Jun 14 12:06:32 ed scsi: [ID 799468 kern.info] ssd0 at fp0: name
w21000004cf8e7591,0, bus address e8
Jun 14 12:06:32 ed genunix: [ID 936769 kern.info] ssd0 is
/pci@8,600000/SUNW,qlc@4/fp@0,0/ssd@w21000004cf8e7591,0
Jun 14 12:06:32 ed scsi: [ID 365881 kern.info] Vendor 'SEAGATE',
product 'ST373405FSUN72G', (unknown capacity)
Jun 14 12:06:32 ed genunix: [ID 408114 kern.info]
/pci@8,600000/SUNW,qlc@4/fp@0,0/ssd@w21000004cf8e7591,0 (ssd0) online
Jun 14 12:06:32 ed scsi: [ID 799468 kern.info] ssd1 at fp0: name
w21000004cf8e7555,0, bus address ef
Jun 14 12:06:32 ed genunix: [ID 936769 kern.info] ssd1 is
/pci@8,600000/SUNW,qlc@4/fp@0,0/ssd@w21000004cf8e7555,0
Jun 14 12:06:32 ed scsi: [ID 365881 kern.info] <SUN72G cyl 14087 alt 2
hd 24 sec 424>
Jun 14 12:06:32 ed genunix: [ID 408114 kern.info]
/pci@8,600000/SUNW,qlc@4/fp@0,0/ssd@w21000004cf8e7555,0 (ssd1) online
Jun 14 12:06:32 ed swapgeneric: [ID 308332 kern.info] root on
/pci@8,600000/SUNW,qlc@4/fp@0,0/disk@w21000004cf8e7555,0:a fstype ufs
...
And of course all the filesystems on this disk failed to fsck or mount.

Using format I can see the bad disk as c1t1d0 (although searching for
disks... seems to take longer than normal)
0. c1t0d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
/pci@8,600000/SUNW,qlc@4/fp@0,0/ssd@w21000004cf8e7555,0
1. c1t1d0 <drive type unknown>
/pci@8,600000/SUNW,qlc@4/fp@0,0/ssd@w21000004cf8e7591,0

If I go ahead and give the correct geometry I can then see the partition
table as I had it before the crash.
Part Tag Flag Cylinders Size Blocks
0 root wm 0 - 412 2.00GB (413/0/0) 4202688
1 swap wu 413 - 1237 4.00GB (825/0/0) 8395200
2 backup wm 0 - 14086 68.35GB (14087/0/0) 143349312
3 unassigned wm 1238 - 1240 14.91MB (3/0/0) 30528
4 var wm 1241 - 2065 4.00GB (825/0/0) 8395200
5 unassigned wm 2066 - 6187 20.00GB (4122/0/0) 41945472
6 usr wm 6188 - 8248 10.00GB (2061/0/0) 20972736
7 home wm 8249 - 14086 28.33GB (5838/0/0) 59407488

I cannot however mount any partition:
mount /dev/dsk/c1t1d0s5 /mnt
mount: I/O error
mount: cannot mount /dev/dsk/c1t1d0s5
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