Date: Tue, 6 Jun 1995 21:40:28 +0200 (MET DST) From: hm@ernie.altona.hamburg.com (Hellmuth Michaelis) To: imb@scgt.oz.au (michael butler) Cc: dufault@hda.com, freebsd-hackers@freebsd.org (FreeBSD Hackers) Subject: Re: Quantum hardware errors (Deferred Error: HARDWARE FAILURE asc:87,0) Message-ID: <m0sJ4UG-0002OfC@ernie.altona.hamburg.com> In-Reply-To: <199506061603.CAA02057@asstdc.scgt.oz.au> from "michael butler" at Jun 7, 95 02:03:44 am
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>From the keyboard of michael butler:
>
> Peter Dufault writes:
> > > # scsi -f rsd0.ctl -m 8
> > > WCE: 1 <--- (write cache enabled, for the -hackers folks)
[...]
> > In 2.1 the system will sanity check the mode page settings during
> > boot and will comment on anything it thinks is set wrong.
>
> Warning .. OK .. but please do not mandate such a change, some drives
> simply do not support the modification of these parameters, e.g. ..
>
> /kernel: (aha0:0:0): "MICROP 2217-15MZ1001904 HQ30" type 0 fixed SCSI 2
> /kernel: sd0(aha0:0:0): Direct-Access 1685MB (3450902 512 byte sectors)
>From ''SCSI Implementation in Micropolis "MZR" Products''
Working Draft - Document No. 110366 Page 2-132:
"Two versions of Page Code 08h exist (SCSI-I/CCS and Micropolis
unique). Switching between the two pages is accomplished via
the CHANGE DEFINITION command."
The SCSI-I/CCS page looks like the direct access page 8 in the SCSI-II
spec X3T9.2/375R revision 10k page 204. The Micropolis unique looks
very Micropolis unique ;-)
In the SCSI-I/CCS page 8, only the RCD and the minimum prefetch field
are supported, all others are "Not used".
In the Micropolis unique version, some 2 or 3 more unimportant fields
are supported.
hellmuth
--
Hellmuth Michaelis hm@altona.hamburg.com Hamburg, Europe
(A)bort, (R)etry, (I)nstall BSD ?
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