Date: Tue, 31 Oct 2006 09:47:17 +0100 From: Fredrik Widlund <fredrik.widlund@qbrick.com> To: freebsd-stable@freebsd.org Cc: scottl@FreeBSD.org Subject: SAS Raid - mfi driver Message-ID: <45470D95.5020801@qbrick.com>
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Hi, We have a problem with the MFI raid-driver under FreeBSD 6.1 and 6.2-PRE. Hardware: Dell 1850 Raid adapter: LSI 8480E There is no problem to detect, initialize and configure, but there is a serious problem with performance with Raid-5. Read performance is good, but write performance bottlenecks at 20MB/s. We've tried different setups but hit the same limitation again and again. The strange part is that a Dell raid adapter based on the same chipset, the Perc 5/I, works well with writes achieving 200MB/s. Any ideas would be greatly appreciated. Kind regards, Fredrik Widlund
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