Date: Wed, 01 Mar 2006 15:26:46 -0500 From: Sven Willenberger <sven@dmv.com> To: Mike Tancsa <mike@sentex.net> Cc: freebsd-stable@freebsd.org Subject: Re: LSI Megaraid (amr) performance woes Message-ID: <1141244806.1013.26.camel@lanshark.dmv.com> In-Reply-To: <6.2.3.4.0.20060301150537.09d7b700@64.7.153.2> References: <1140727266.23965.43.camel@lanshark.dmv.com> <20060223205342.GA91253@xor.obsecurity.org> <1141240258.1013.19.camel@lanshark.dmv.com> <6.2.3.4.0.20060301150537.09d7b700@64.7.153.2>
next in thread | previous in thread | raw e-mail | index | archive | help
On Wed, 2006-03-01 at 15:08 -0500, Mike Tancsa wrote: > At 02:10 PM 01/03/2006, Sven Willenberger wrote: > > >I cvsupped a 6.1 prerelease and found no performance improvements. I did > >some further tests and the performance issues seem very specific to the > >mirroring aspect of the raid: > > > I am not familiar with the LSI cards, but with older 3ware and the > ARECA cards, the raid sets when in any sort of redundancy mode must > initialize in the background before normal use. Until that is > complete, performance is seriously slow. Is the LSI doing that, and > perhaps just not telling you ? > > ---Mike > I had thought of this too so I disabled the rapid (background) initialization option and let the raids build to completion the slow way. So unless it is still building even after it is done (or is doing some other odd processor-intensive crc checking or something) I don't think this is the source of the problem. Sven
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?1141244806.1013.26.camel>