Path: utzoo!mnetor!uunet!husc6!rutgers!iuvax!jec
From: jec@iuvax.cs.indiana.edu (James E. Conley)
Newsgroups: comp.sys.apollo
Subject: DSP90 w/CDC 500MB Drives: Disk Errors
Message-ID: <7087@iuvax.cs.indiana.edu>
Date: 23 Mar 88 02:53:53 GMT
Reply-To: jec@iuvax.UUCP (James E. Conley)
Organization: Indiana University CSCI, Bloomington
Lines: 33


	I've recently experienced problems with disk errors on our two
servers.  This is our configuration:

	DSP-90 w/3MB
	2 MSD500 drives
	SR9.7 (did an SR9.7 invol)

	It appears for some reason that we are getting excessive disk
errors on BOTH systems on BOTH drives.  We are mainly getting DISK BLOCK
HEADER errors.  I tried the following to remedy the situation:

	(1) INVOL the bad disk getting a list of bad blocks to put
            in the bad block list. 

	(2) Adding the bad blocks.  This put us a 210 bad blocks on the
	    one disk I've tried this on.

	(3) RE-INVOLing the disk (got no errors, but it appears to reserved
            a 1 block partition or something like that-- I think the bad
            block table must have exceeded its normal boundaries or something
            like that)

	(4) Booting diskless and installing SR9.7

	(5) Trying to boot on that disk and getting SYSBOOT not found
            errors.

	I normally would suspect just a bad disk, or bad controller or even
a bad DSP-90, but for both systems to have so similar problems I am leaning
toward suspecting the operating system itself.  Has anyone else had this sort
of thing and what did you do?  I have Apollo Field Service on it now, but he
is a new person and I've always had bad luck with new people.