Date: Wed, 16 Jul 2008 21:57:42 +0200 From: Maciej Suszko <maciej@suszko.eu> To: freebsd-hardware@freebsd.org Subject: Re: Dell PE2950 - SAS 6/iR Message-ID: <20080716215742.17a82b52@suszko.eu> In-Reply-To: <487E2585.7080409@optiksecurite.com> References: <20080716174233.1232a5f3@suszko.eu> <487E2585.7080409@optiksecurite.com>
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--Sig_/zLayg=a4+AZxgGkglslwKM+ Content-Type: text/plain; charset=ISO-8859-2 Content-Transfer-Encoding: quoted-printable FreeBSD <freebsd@optiksecurite.com> wrote: > Maciej Suszko a =E9crit : > > 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? > > =20 > I never tried SAS 6 but I have SAS 5 in a few Dell servers and it's=20 > performance is horrible. I tried some tips I read to optimize the=20 > 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 >=20 > The last server I bought is a PowerEdge 840 with PERC5 but this time=20 > with 7200RPM SATA drives (3 in RAID 5) and the performance is still=20 > impressive : Throughput 266.81 MB/sec 4 procs >=20 > I highly recommand upgrading to the PERC controller. >=20 > SAS5 is recognized by the mpt driver and PERC5 by mfi. >=20 > YMMV, >=20 > Martin Thanks for reply Martin, I think I'm not gonna take the risk and I stay with PERC5 controller. Have you used integrated PERC5 or external one? And one more question - how about controller monitoring - there is a sysutils/linux-megacli, have you tested it? Is it working with your PERC? --=20 regards, Maciej Suszko. --Sig_/zLayg=a4+AZxgGkglslwKM+ Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (FreeBSD) iEYEARECAAYFAkh+UrYACgkQCikUk0l7iGrR1QCcCxRit4hJwV910NfRLx/r0Spc Tz4An3rDhZxdxgqvcFTTiu5g9Fi8R2KJ =XYoo -----END PGP SIGNATURE----- --Sig_/zLayg=a4+AZxgGkglslwKM+--
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