Date: Fri, 15 Nov 2013 03:49:53 +0000 From: Shawn Wallbridge <shawn.wallbridge@imaginaryforces.com> To: "freebsd-fs@FreeBSD.org" <freebsd-fs@FreeBSD.org> Subject: Re: Controller for ZFS Message-ID: <CEAAD989.124D5%shawn.wallbridge@imaginaryforces.com> In-Reply-To: <49F719A9-AC50-4917-8809-F51EBD4F5D0F@sarenet.es>
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On 11/14/13 2:49 AM, "Borja Marcos" <borjam@sarenet.es> wrote: > >On Nov 13, 2013, at 7:41 PM, Shawn Wallbridge wrote: > >> I was wondering what the preferred/best supported 24port SAS/SATA >> controller is for FreeBSD? I have a box with a LSI/3Ware 9750-24i4e in >>it, >> which I can use in JBOD mode, but it seems like a waste to me. > >Not only a waste, but a serious problem. > >You absolutely do not want a "JBOD mode" in which you create so-called >RAID0 1-drive logical volumes. > >You absolutely do want a silly and stupid HBA which just passes SAS/SATA >commands from the OS to the drives >and back. > >The "JBOD mode" offers a fake device in which the "intelligent" >controller makes its own decisions and, of course, hides >the very important SAS/SATA status codes from the OS. > >ZFS knows better. > >The one I use is sold by Dell as the "H200". They usually try to disuade >you by saying that it's not intelligent, doesn't >offer RAID, some of their "configuration aids" even forbid it... I just >tell the salesman to shut up because I know much better than him. > >The only problem: beware if you are using a built-in backplane in the >server, some manufacturers insist on using different >cabling schemes for different controllers and you could run into stupid >problems because of that. > >FreeBSD 10 identifies one of my cards as this one: >mps0: <LSI SAS2008> port 0x7c00-0x7cff mem >0xd4ff0000-0xd4ffffff,0xd4f80000-0xd4fbffff irq 80 at device 0.0 on pci67 >mps0: Firmware: 07.15.08.00, Driver: 16.00.00.00-fbsd >mps0: IOCCapabilities: >185c<ScsiTaskFull,DiagTrace,SnapBuf,EEDP,TransRetry,IR> > >Borja. I was leaning towards two of these. http://www.newegg.com/Product/Product.aspx?&Item=3DN82E16816118142 LSI LSI00244 (9201-16i) PCI-Express 2.0 x8 SATA / SAS Host Bus Adapter Card, What do you guys think? shawn ________________________________ This e-mail is intended only for the named person or entity to which it is = addressed and contains valuable business information that is proprietary, p= rivileged, confidential and/or otherwise protected from disclosure. If you = received this e-mail in error, any review, use, dissemination, distribution= or copying of this e-mail is strictly prohibited. Please notify us immedia= tely of the error via e-mail to <ifpostmaster> postmaster@imaginaryforces.c= om and please delete the e-mail from your system, retaining no copies in an= y media. We appreciate your cooperation. ...imaginaryforces.com...=0D
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