Path: utzoo!utgpu!watmath!uunet!xanth!mcnc!rutgers!bpa!manta!brant
From: brant@manta.pha.pa.us (Brant Cheikes)
Newsgroups: unix-pc.general
Subject: HDERR: the continuing saga
Keywords: Seagate ST-4096, oy vey
Message-ID: <453@manta.pha.pa.us>
Date: 6 Dec 88 20:46:04 GMT
Reply-To: brant@manta.pha.pa.us (Brant Cheikes)
Distribution: unix-pc
Organization: Soul of the Gnu Machine, Philadelphia
Lines: 23

Sigh.  Intermittent HDERRs continue to appear in my unix.log.  I
checked the power supply as Thad Floryan suggested; you couldn't ask
for more accurate voltage output.  A sample log entry:

HDERR ST:51 EF:10 CL:FFA1 CH:FF00 SN:FF0C SC:FF02 SDH:FF24 DMACNT:FFFF
DCRREG:94 MCRREG:D300 Tue Dec  6 03:20:14 1988

I even found:

HD:Spurious interrupt Tue Dec  6 10:56:05 1988

Would some kind soul with access to the HD controller specs please
post the meaning of all bits in these registers: ST, EF, SC, DCRREG,
MCRREG.  I understand CL = cylinder low, CH = cylinder high, SN =
sector, SDH = head.

If anyone has an informed opinion on whether it's the disk or the
controller (or ?) at fault here, I'd appreciate very much to hear it.
-- 
Brant Cheikes
University of Pennsylvania
Department of Computer and Information Science
brant@manta.pha.pa.us, brant@linc.cis.upenn.edu, bpa!manta!brant