Date: Thu, 17 Dec 2009 22:54:59 +0100 From: Erik Norgaard <norgaard@locolomo.org> To: Chuck Swiger <cswiger@mac.com> Cc: questions@freebsd.org Subject: Re: System crashes under heavy disk i/o Message-ID: <4B2AA8B3.5080000@locolomo.org> In-Reply-To: <69AC657B-A0A7-41CA-92F6-989FEFEB776E@mac.com> References: <4B2AA1F4.5020206@locolomo.org> <69AC657B-A0A7-41CA-92F6-989FEFEB776E@mac.com>
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Chuck Swiger wrote: > Hi-- > > On Dec 17, 2009, at 1:26 PM, Erik Norgaard wrote: >> FreeBSD 8.0-RELEASE-p1 #0: Fri Dec 11 11:53:19 CET 2009 >> norgaard@localhost:/usr/local/obj/usr/local/src/sys/GENERIC >> Timecounter "i8254" frequency 1193182 Hz quality 0 >> CPU: VIA Nehemiah (800.04-MHz 686-class CPU) >> Origin = "CentaurHauls" Id = 0x69a Stepping = 10 >> real memory = 268435456 (256 MB) >> avail memory = 231383040 (220 MB) >> atapci0: <VIA 6420 SATA150 controller> >> ad6: 476940MB <Seagate ST3500320NS SN04> at ata3-master SATA150 >> >> In normal operation I have no problem, but when performing intensive read or write for a prolonged time the system crashes. This happens also even if the partition is read-only. The crash occurs both with single large files (1GB) as well as many small files (10kb-10MB). > > That's probably a sign of either thermal problems from inadequate cooling, or possibly PSU not giving stable voltage rails and sagging a bit too low; also, at least the older VIA C3 EPIA hardware had somewhat flaky PATA interfaces; if I tried to use both PATA channels I'd see lockups, unless I turned everything down to UDMA-33 speeds. I doubt it's the cooling, processor is currently at 48C with passive cooling. But it could be PSU, I got the system for low power fanless silent operation, but after having disk crashes with laptop disks under heavy i/o, I got a server disk to sustain the continuous use. I'll try to slow it down and see if it helps, thanks for the advice. Erik -- Erik Nørgaard Ph: +34.666334818/+34.915211157 http://www.locolomo.org
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