From: Ricardo \(Tru64 User\) (tru64user@yahoo.com)
Date: Fri Jan 16 2004 - 16:39:49 EST
I feel stupid....
thnx to all who replied.
I thought bcheckrc will always do the mount /, but
apparently not always (it always do that on my 4100's
at least so far)
so i had to go thru the mount -u /, which gave me a
chance to edit fstab.
All FS's were ufs...is that the reason why it would
not boot at all? I expected it to yell about problem
disk, and continue without mounting it.
I have isolated the dead disk.....and came back up.
_Thanks
If the disk was getting I/O errors before the problem
and has disappeared after the reboot, the odds are
pretty good that it failed.
With the operating system shutdown, use the console
to see what devices are seen by the console "SHOW
DEVICE" command. If the drive in question isn't
one of them, then whatever is wrong is enough to
prevent simple, common, SCSI commands from working.
Check the connectivity of the device back to the
host, since it could be cabling. If the console
still can't see the drive, contact your service
vendor to get the drive replaced.
If the console can see it boot the host to single
user.
Run bcheckrc to verify the other file systems are
ok. That will also probably leave the root mounted.
If not, mount it with "mount -u /". Then edit
/etc/fstab to prevent future reboots from trying
to check the device (at least until repaired).
Then you can boot to multiuser if there are others
using the system that don't depend on the drive.
Whether single user or multiple user, use scu(8) to
see if the drive will offer a clue what is wrong.
If the operating system didn't see it, you'll need
to set the address explicitly. The special file
name of rz31 suggests that the disk is on bus 3,
target 7, LUN 0. Use "set nexus" to identify the
address. Then try some simple SCSI commands:
show device - Inquiry
show capacity - Read Capacity
tur - Test Unit Ready
If these fail, they may offer a clue what is wrong.
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