SUMMARY- SCSI Error

Thanks to All,

I am grateful to all of you for supplying additional information and
diagnostics on SCSI HDD

The real problem was the DISK itself had gone worse. It had innumerable bad
sectors and could not be

read at any point of time. Even the format->analyze->refresh or read would
exit saying disk not ready

I am posting the summary as promised with the following suggestions from
some of our experts


POST-1

I suggest you confirm that the drive is ok by going into format and
checking
it with the analyze/test facility on the drive. If thats ok I suggest
checking by forcing a lookup an a different superblock using fsck.


POST-2

Possible resolution:

format

choose c2t1d0s2

analyze

refresh


 This will perform a surface analysis and correct ( move ) any bad blocks.
This procedure will NOT harm/corrupt data.


POST-3

It sounds like you have lost the hard drive or, at least, that
partition.

The mount command may have a switch to force the mount of the
partition.

Regardless, it sounds like it is time to replace the hard drive.

POST-4


Run format, select the drive, select
analyze, then read.  You need to "tail -f /var/adm/messages"  while running
the analyze,  if you see more if this messages, then you need to replace
the
disk soon.

POST-5

Well, "Disconnected command timeout for Target 1.0" implies that your scsi
controller could not communicate with c2t1d0.  Check your cables and power
connections first and see if that helps.  This could be either a dead disk
drive, or a bad connection.  You may want to start looking for your last
backup tape...assuming you're backing up.


Thanks again to all of you.
finally I am replacing the SUN Hard-disk


Regards,

Irfan K Khan
IDM-Mumbai
Tata Consultancy Services
Nariman Point, Mumbai - 21
+91-22-2880378
+91-22-2024827 Ext:238