Re: System crashes under heavy disk i/o
On Thursday 17 December 2009 12:57:30 Erik Norgaard wrote: Mel Flynn wrote: Turn down operating mode via atacontrol. If using dump(8) use the cache feature and/or do the backup from live disk, so no other services are running and disk isn't accessed other then by dump. Thanks, is there a way to set UDMA mode at boot? Roll your own rc(8). I know not of a loader tunable or device.hints setting, but I'm happily corrected on that. -- Mel ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
System crashes under heavy disk i/o
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 norga...@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 ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: System crashes under heavy disk i/o
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 norga...@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. Hopefully their SATA implementation has been improved since. Consider looking at smartctl and see whether your drive temps are running too hot-- supposedly, drives are rated up to around 60C, but I don't like to see drives going above 40C given any choice in the matter. Regards, -- -Chuck ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: System crashes under heavy disk i/o
On Thursday 17 December 2009 12:26:12 Erik Norgaard wrote: My two questions: - is there any utility that I can use monitor the system to see what's going on, when or why? gstat(8) Also, perhaps syslog to a different machine or nfs mount /var/log if you feel you're missing a log message due to this error. - is there any way that I can slow down the disk i/o? Turn down operating mode via atacontrol. If using dump(8) use the cache feature and/or do the backup from live disk, so no other services are running and disk isn't accessed other then by dump. -- Mel ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: System crashes under heavy disk i/o
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 norga...@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 ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: System crashes under heavy disk i/o
Mel Flynn wrote: Turn down operating mode via atacontrol. If using dump(8) use the cache feature and/or do the backup from live disk, so no other services are running and disk isn't accessed other then by dump. Thanks, is there a way to set UDMA mode at boot? BR, Erik -- Erik Nørgaard Ph: +34.666334818/+34.915211157 http://www.locolomo.org ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
