[comp.unix.xenix] Hard Disk Failures on Compaq 386/20

ragnar@dvlmarv.UUCP (Ragnar Paulson) (03/17/88)

This is a request for help/information on a recurring hard disk
crash we are experiencing. We have a Model 130 Compaq 386/20 with
40 Mbyte internal tape back up (Irwin).  We are running SCO Xenix 2.2 
for the 386. 

There are two problems, maybe related. The first occurs during  
use of the tape drive. Sometimes, when a tape is inserted, the
hard disk light begins to flash regularly, and all subsequent accesses
produce disk error messages. This happens as soon as the tape is 
inserted, before the drive finishes repositioning to the beginning of
the tape. Once it even happened before I finished pushing the tape
in. This leads me to believe it is a hardware problem and support at SCO
tends to agree. 

However when I talk to our hardware suppliers they've never heard 
of a problem like this. They said it sounds like a the drive "powered-down"
and suggested we replace the power-supply or the hard disk. Replacing
the power supply didn't help. So now they want to replace the hard disk.
Will this help? Has anyone heard of something like this? 

Far less frequently, we lose files in the root partition. The filenames
and directory entries are preserved, but the inode content appear to
have been over-written with those of another inode. When this happens
it usually appears that 8 consecutive inodes have been written onto
8 other consecutive inodes (a sector perhaps?). Running fsck, and
restoring the lost files fixes the problem. 

I haven't been able to identify any common cause of this, mostly
because there is no way to pinpoint precisely when it happens, and it has
only occurred two or three times.

If anyone has heard of this, or can ensure that replacing the
hard disk is a cure, please email me.

		Thanks, 
			Ragnar
-- 
Ragnar Paulson 					...lsuc!dvlmarv!tsgfred!ragnar
The Software Group Limited
4701 Steeles Avenue West, Suite 201
Weston, Ontario,  M9l 1X2