Date: Sat, 28 Dec 1996 22:21:18 -0800 (PST) From: "Rodney W. Grimes" <rgrimes@GndRsh.aac.dev.com> To: brandon@glacier.cold.org (Brandon Gillespie) Cc: freebsd-hardware@freebsd.org Subject: Re: AHA 2940UW? Linux works.. Message-ID: <199612290621.WAA00617@GndRsh.aac.dev.com> In-Reply-To: <Pine.NEB.3.95.961224102248.27912A-100000@glacier.cold.org> from Brandon Gillespie at "Dec 24, 96 10:29:00 am"
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> I REALLY need help with this, our server is continually rebooting since we > installed the AHA 2940UW controller and new UltraSCSI drive. It is not a > heavilly loaded system, but it does run a database system that NEEDS to > syncronize its database before shutting down. Every time this system > reboots we loose critical data to the last backup. This is flat out > unacceptable. I really like FreeBSD much more than Linux, but at this > point others in the group are suggesting we move to Linux because they > know this hardware works fine in Linux. In my experience I've never known > a system to simply reboot when it was a hardware problem (generally if its > a hardware problem it simply freezes up or does not work at all). This is > working for two to three days when suddenly *wham* reboot. > > Help?? My experience in tracking down ``spontainious reboots'' on FreeBSD systems is that this is usually either memory or a bad motherboard. If I recall your earlier mail you had converted from IDE to AHA2940, which leads me to suspect a motherboard problem in the cache invalidation logic with respect to bus mastered DMA. You didn't saymuch else about the hardware, and ``it'll run Linux'' doesn't tell me much, as Linux does not do a lot of the performance enhancements in FreeBSD that requires _CORRECTLY_ designed boards. Hardware problems _often_ cause exactly what you are seeing, but then so do software problems. -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation, Inc. Reliable computers for FreeBSD
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