From owner-freebsd-stable Sat Aug 14 23:34:47 1999 Delivered-To: freebsd-stable@freebsd.org Received: from guru.phone.net (guru.phone.net [209.157.82.120]) by hub.freebsd.org (Postfix) with SMTP id B2F4C1519E for ; Sat, 14 Aug 1999 23:34:45 -0700 (PDT) (envelope-from mwm@phone.net) Received: (qmail 1158 invoked by uid 100); 15 Aug 1999 06:32:01 -0000 Received: from localhost (sendmail-bs@127.0.0.1) by localhost with SMTP; 15 Aug 1999 06:32:01 -0000 Date: Sat, 14 Aug 1999 23:32:01 -0700 (PDT) From: Mike Meyer To: stable@FreeBSD.ORG Subject: Re: Random disk read problems In-Reply-To: <199908150436.WAA22431@harmony.village.org> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Sat, 14 Aug 1999, Warner Losh wrote: :-> I've been told that 1542's do not work well with multi-user/multi-taskin :-> g O/S's. I'm not sure what SCSI controller you're using. Could it be :-> that your controller is corrupting data when it is "very" busy? I've got two: An Adaptac 7890 Ultra II LVD built into the motherboard that the Seagate disk is on, and an Adaptac 2940UW that the slower devices (CD-ROM, CDR, Jazz) are on. The latter isn't involved in these things - yet, anyway. Bad memory seems like the best bet. The BIOS on the motherboard (a SuperMicro S2DGU) has settings for memory checking that are disabled (it came from the vendor that way, with FreeBSD 2.2.8 installed). Is there any point in turning this on? Anything I can do besides buying another DIMM to plug in to test it? Thanx,