Date: Sat, 25 Jun 2011 17:39:23 +0200 From: Leon =?iso-8859-15?Q?Me=DFner?= <l.messner@physik.tu-berlin.de> To: freebsd-questions@freebsd.org Subject: Re: SAS controller for FreeBSD Message-ID: <20110625153923.GG74606@emmi.physik-pool.tu-berlin.de> In-Reply-To: <alpine.LFD.2.00.1106241843120.22469@nber7.nber.org> References: <alpine.LFD.2.00.1106241843120.22469@nber7.nber.org>
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On Fri, Jun 24, 2011 at 06:51:37PM -0400, Daniel Feenberg wrote: > > We have been using ZFS under FreeBSD for a while, and are very pleased, > but are considering building a system with SAS drives, in the hope that > they will be faster (any truth to that?). I am assuming that I should look > for a non-RAID controller, but I can't find any SAS controllers that don't > claim to do RAID and are on the FreeBSD compatibility list. I have always > thought that using a RAID controller for a non-raid partition was a bad > idea, since it limited ones ability to swap controllersm, and presumably > if we are using ZFS for our RAID we don't need another level of RAID > provided by the controller. Is that prejudice justified? > > There are some SAS RAID controllers that claim to support FreeBSD but I > can't tell if their JBOD mode is a true pass-through, or leaves some > undesirable junk on the disk. > > So does anyone have a recomendation for a reasonably priced SAS > controller? We aren't looking for anything fancy at this point. We are using two of the LSI SAS2008 based cards here and have no problems with them. Be sure to run a recent STABLE as the mps driver is relatively new. Speed and reliability are very nice. The only thing we are missing is IR-Firmware support but if you only want a HBA this won't bother you. cherio, Leon
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