Date: Thu, 17 Dec 2009 22:26:12 +0100 From: Erik Norgaard <norgaard@locolomo.org> To: questions@freebsd.org Subject: System crashes under heavy disk i/o Message-ID: <4B2AA1F4.5020206@locolomo.org>
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Hi:
I have had this problem for a while, both on 7.x and now with 8.0:
I have a:
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).
Currently, I'm backing up to an external drive over the network. I don't
know if it's network related or disk related, but I guess it's disk
related as I have no log of the failure. I don't know if it's the disk,
contoller or something else. This is a headless machine, so I'm left
guessing.
My two questions:
- is there any utility that I can use monitor the system to see what's
going on, when or why?
- is there any way that I can slow down the disk i/o?
since the system works fine in normal operation, I hope that slowing
down the disk operation would be a workaround, at least till I get my
data onto the external drive.
Thanks, Erik
--
Erik Nørgaard
Ph: +34.666334818/+34.915211157 http://www.locolomo.org
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