Date: Sat, 22 Mar 2003 14:17:13 -0500 From: Bruce Campbell <bruce@engmail.uwaterloo.ca> To: MikeM <zlists@mgm51.com> Cc: freebsd-hardware@FreeBSD.ORG, freebsd-questions@FreeBSD.ORG Subject: Re: problem on 1TB filesystem RAID 5 3ware Message-ID: <1048360633.3e7cb6b92be8a@www.nexusmail.uwaterloo.ca> In-Reply-To: <200303211911260025.003E1BB2@sentry.24cl.com> References: <200303211911260025.003E1BB2@sentry.24cl.com>
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Some more test results: 22 Mar 2003 - test with RAID 5 with 4 * WD 200GB with Write Cache disabled *succeeded*. Write Cache can be disabled through the 3ware BIOS, or the 3ware web management tool. Raw write performance to the array dropped from 30000KBytes/Second to 4500KBytes/Second, however this did not impact the test significantly, as the test involved copying data via an NFS mount on a 100 MBit/second network. The effective speed of the NFS copy dropped from around 5000 KBytes/Second to about 4500 KBytes/Second with Write Cache disabled. Thread here: http://oss.sgi.com/projects/xfs/mail_archive/200211/msg00056.html suggests firmware/driver mismatches can cause trouble, and someone else who had trouble found turning off write cache fixed it. All my info on this problem being kept here: http://www.freebsd.uwaterloo.ca/twiki/bin/view/Freebsd/BackupServerProblem Quoting MikeM <zlists@mgm51.com>: > Jim King <jim@jimking.net> wrote: > > >Which tells me that all of the work in the last year has been > >maintenance related to changes within FreeBSD itself, and not any > >updates for 3Ware functionality, e.g no support for firmware 7.5.x > >on the 7000 series controllers, and no support for the 8000 series > >controllers. > > > If the above is true, perhaps the hardware guide should be modified. It > currently says that the 3Ware 7000 series is supported. > > I, for one, purchased a 3Ware controller for my FreeBSD server based upon > the misleading hardware guide. > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-hardware" in the body of the message > -- Bruce Campbell Engineering Computing CPH-2374B University of Waterloo (519)888-4567 ext 5889 ---------------------------------------- This mail sent through www.mywaterloo.ca To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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