Date: Wed, 17 Oct 2007 17:43:07 +0100 From: Richard Tector <richardtector@thekeelecentre.com> To: Stefan Lambrev <stefan.lambrev@moneybookers.com> Cc: freebsd-current@freebsd.org Subject: Re: Very slow HP 8 Internal Port SAS HBA with RAID 0, 1 on Hot Plug SAS/SATA Models (LSI SAS1068 - mpt) Message-ID: <47163B9B.4010901@thekeelecentre.com> In-Reply-To: <47163ACC.1080807@moneybookers.com> References: <47161A42.2050306@moneybookers.com> <471636E4.90807@thekeelecentre.com> <47163ACC.1080807@moneybookers.com>
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This is a cryptographically signed message in MIME format. --------------ms080905070108010901030409 Content-Type: text/plain; charset=windows-1251; format=flowed Content-Transfer-Encoding: 7bit Stefan Lambrev wrote: > Richard Tector wrote: >> Stefan Lambrev wrote: >>> Hi list, >>> >>> I'm having problems with the raid controller of HP ProLiant DL140 G3 >>> Server and RELENG_7 >>> >>> I have 2x 500GB SATA HDDs configured as mirror, but the write speed >>> is very slow ~7MB/s. >>> >>> I guess that there is no battery for the raid controller and the >>> write cache is off, but 7MB/s .. >>> Also there is no way to see the status of the raid from FreeBSD ? >>> >>> Any ideas how to improve this? >> >> Write cache is the most probable cause. >> You can force it on with: >> hw.mpt.enable_sata_wc=1 > This have to be put in /boot/loader.conf as I do not see such sysctl? > Anyway I'll force the write cache to be always on from the raid > configuration if this does not work. If you have the option in the RAID bios. Try that first. Failing that, yes, pop that in /boot/loader.conf, and it should do the trick. 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