Date: Sun, 16 May 2010 20:15:57 +0200 From: Pieter de Boer <pieter@thedarkside.nl> To: Jeremy Chadwick <freebsd@jdc.parodius.com> Cc: freebsd-stable@freebsd.org Subject: Re: Read / write timeouts on SATA disks connected to ICH9 Message-ID: <4BF0365D.7010207@thedarkside.nl> In-Reply-To: <20100515233018.GA50125@icarus.home.lan> References: <4BED8B89.6010901@os3.nl> <20100514195346.GA8977@icarus.home.lan> <4BEDBC08.2040002@os3.nl> <20100514224236.GA11680@icarus.home.lan> <4BEE476B.6020407@os3.nl> <20100515162624.GA39585@icarus.home.lan> <4BEF066F.3090703@os3.nl> <4BEF0F31.9050405@thedarkside.nl> <20100515233018.GA50125@icarus.home.lan>
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Hi Jeremy, <SNIP: both old disks were fine> > Anyway, if heavy disk/controller load appears to be causing these > problems, you could have power-related issues. Possibly the combination > of two disks + heavy I/O causes enough power draw that the ICH9 starts > to behave oddly. Voltages which deviate too much can cause odd things > to happen to hardware. If you have the time/money, you might try > replacing the PSU in your system to see if there's any improvement; your > BIOS should be able to provide you Hardware Monitoring statistics > (voltages). Write these down before and after the PSU swap. You don't > need to go crazy and buy a 1000W PSU or anything, but 450-750W is pretty > normal these days. As this is a 19" 1U box, I'd need to buy a replacement PSU from Dell or a reseller. Not too expensive, but I'd like to avoid that. While looking through the CVSweb of RELENG_8, I found that ATA timeouts have been raised in 8 recently. On http://wiki.freebsd.org/JeremyChadwick/ATA_issues_and_troubleshooting and other URLs, like http://linux-bsd-sharing.blogspot.com/2009/03/howto-fix-sata-dma-timeout-issues-on.html, I found that increasing the timeout might help. So that's what I'll try next time it happens again. If that still doesn't work, I can take a better look at the voltage levels. -- Pieter
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