From owner-freebsd-hackers Mon Apr 1 09:12:28 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id JAA07723 for hackers-outgoing; Mon, 1 Apr 1996 09:12:28 -0800 (PST) Received: from phaeton.artisoft.com (phaeton.Artisoft.COM [198.17.250.211]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id JAA07717 for ; Mon, 1 Apr 1996 09:12:25 -0800 (PST) Received: (from terry@localhost) by phaeton.artisoft.com (8.6.11/8.6.9) id KAA13637; Mon, 1 Apr 1996 10:05:57 -0700 From: Terry Lambert Message-Id: <199604011705.KAA13637@phaeton.artisoft.com> Subject: Re: Dell EIDE drive data corruption with FreeBSD? To: hlew@genome.Stanford.EDU (Howard Lew) Date: Mon, 1 Apr 1996 10:05:57 -0700 (MST) Cc: terry@lambert.org, macgyver@infinet.com, hackers@FreeBSD.org In-Reply-To: from "Howard Lew" at Mar 31, 96 09:36:29 pm X-Mailer: ELM [version 2.4 PL24] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@FreeBSD.org X-Loop: FreeBSD.org Precedence: bulk > > > > > A while ago, I rememeber someone posted something about it. > > > > > I think the machine in question was a Dell P75 with EIDE drive, > > > > > > > > > > Was a solution found? > > > > > > > > Is this the flawed IDE chipset that loses data if you interleave I/O? > > > > > > > > If so, the answer is to change your CMOS settings. > > > > > > Hmmm.... what chipset did they use? > > > > PC-TECH RZ1000 chip. About 1/3 of all onboard EIDE disk controllers > > are broken. I don't know how many controller cards. > > > Is there a diagnostic program out there to discover the flaw or is it > more or less a random problem that crops up once in a while? Read the board doc and don't buy equipment with these chips. 8-(. You can also avoid the problem by not buying IDE. It's on the order of broken cache writeback (or original Saturn and Mercury chipsets, etc.). It would take a specialized hardware card coupled with software to properly diagnose. If you have this chip, hope that you have an extended CMOS setup, or you will have to replace the card/disable the motherboard IDE to fix it. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.