Date: Wed, 16 Jul 2008 12:44:53 -0400 From: FreeBSD <freebsd@optiksecurite.com> To: Maciej Suszko <maciej@suszko.eu> Cc: freebsd-hardware@freebsd.org Subject: Re: Dell PE2950 - SAS 6/iR Message-ID: <487E2585.7080409@optiksecurite.com> In-Reply-To: <20080716174233.1232a5f3@suszko.eu> References: <20080716174233.1232a5f3@suszko.eu>
next in thread | previous in thread | raw e-mail | index | archive | help
Maciej Suszko a écrit : > I think about buying Dell PE2950 with SAS 6/iR integrated RAID > controller. It would be double Intel Quad Core Xeon E5420 with 3.5" SAS > 15k RPM disks connected to SAS 6/iR RAID controller. > > I'm curious if anyone is running FreeBSD-7.0-RELEASE on such machine > and if there any problems with this controller - is SAS 6/iR supported > by mpt or mfi? Anyone happily using it? > I never tried SAS 6 but I have SAS 5 in a few Dell servers and it's performance is horrible. I tried some tips I read to optimize the performance but none worked (I must admit that I didn't tried that hard but still...). Just to compare, I have the exact same disk (the same 3,5" SAS 15K that you plan to buy) in a PowerEdge 860 with SAS 5 and in a PowerEdge 1950 with PERC5 (both in RAID 1) and the performance are like day and night (tested with dbench): SAS 5: Throughput 98.9811 MB/sec 4 procs PERC5: Throughput 321.704 MB/sec 4 procs The last server I bought is a PowerEdge 840 with PERC5 but this time with 7200RPM SATA drives (3 in RAID 5) and the performance is still impressive : Throughput 266.81 MB/sec 4 procs I highly recommand upgrading to the PERC controller. SAS5 is recognized by the mpt driver and PERC5 by mfi. YMMV, Martin
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?487E2585.7080409>