Date: Sat, 19 Feb 2011 00:02:56 +0100 From: Francois Tigeot <ftigeot@wolfpond.org> To: Jeremy Chadwick <freebsd@jdc.parodius.com> Cc: freebsd-scsi@freebsd.org, stable@freebsd.org Subject: Re: mps(4) driver (LSI 6Gb SAS) commited to stable/8 Message-ID: <20110218230256.GA2038@sekishi.zefyris.com> In-Reply-To: <20110218223832.GA68261@icarus.home.lan> References: <20110218164209.GA77903@nargothrond.kdm.org> <alpine.BSF.2.00.1102190104280.14809@woozle.rinet.ru> <20110218223832.GA68261@icarus.home.lan>
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On Fri, Feb 18, 2011 at 02:38:32PM -0800, Jeremy Chadwick wrote: > > > Please be aware of a performance issue affecting certain models of WD > RE4 disks. Specifics are still sketchy, but you should read the thread > "immense delayed write to file system (ZFS and UFS2), performance > issues" in full to get an idea of the problem: > > http://lists.freebsd.org/pipermail/freebsd-stable/2010-January/thread.html#54185 > > There's confirmation of the problem here, with the statement that WD > gave at least one person a firmware image that fixed the problem: > > http://lists.freebsd.org/pipermail/freebsd-stable/2010-January/054489.html I'm not sure if this is exactly the same issue, but I also had to flash some WD drives a few month ago. There was a bad firmware version on some 2TB RE4-GP models; disks kept getting removed from RAID volumes due to write timeouts. > Buyer beware. :-) And remember, it's not an issue with the > brand/vendor, just certain models. Disks these days are no longer just disks, but complete computers with ram, many processors, and the associated software issues... -- Francois Tigeot
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