Date: Fri, 20 May 2005 15:13:06 -0700 From: "Vinod Kashyap" <vkashyap@amcc.com> To: Alexis Yushin <alexis@ww.net>, freebsd-performance@freebsd.org Subject: RE: Bad 3ware 9000 performance 5.4? Message-ID: <IGT72S02.C5S@hadar.amcc.com>
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> -----Original Message----- > From: owner-freebsd-performance@freebsd.org > [mailto:owner-freebsd-performance@freebsd.org]On Behalf Of = > Alexis Yushin > Sent: Thursday, May 19, 2005 8:14 PM > To: freebsd-performance@freebsd.org > Subject: Bad 3ware 9000 performance 5.4? > = > = > Hi, > = > I've been browsing through the mailing list archive, but = > could not find the > answer/conclusion/solution to this... > = > Running FreeBSD 5.4... three machines with twe/3ware 8000 and = > three twa/ > 3ware 9500-8 controllers. All of them running RAID 1+0 = > without write cache > since we dont have battery backup unit. All of them Seagate 7200 SATA. > = > I get about 46Mb/s write on the 8000 series and only 5(!)MB/s = > on the 9500 series. > = > How is this possible? Machines are in production so I can do = > very little > testing... Any ideas? > = You have to have write caching enabled to get better write performance. If you see bad numbers even with caching enabled, check to see if all drives/cables are ok. > = > _______________________________________________ > freebsd-performance@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-performance > To unsubscribe, send any mail to = > "freebsd-performance-unsubscribe@freebsd.org" >
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