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 <[EMAIL PROTECTED]>: > Jim King <[EMAIL PROTECTED]> 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 [EMAIL PROTECTED] > 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 [EMAIL PROTECTED] with "unsubscribe freebsd-questions" in the body of the message
