Date: Wed, 31 Oct 2007 17:44:08 +0100 From: Borja Marcos <borjam@sarenet.es> To: Scott Long <scottl@samsco.org> Cc: freebsd-scsi@freebsd.org Subject: Re: MFI and passthrough Message-ID: <7E446609-4B76-4C36-9B8C-2F98DB5190C6@sarenet.es> In-Reply-To: <4727FA4A.2000708@samsco.org> References: <78A4617F-59F8-4CB2-9BFD-B6E9FD86A9C8@sarenet.es> <4727FA4A.2000708@samsco.org>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Oct 31, 2007, at 4:45 AM, Scott Long wrote: > The passthrough interface is really only meant for doing management > tasks like SMART monitoring and firmware flashes. I've also seen it > used for low-duty devices like tape drives. I do not recommend > using it > to directly control disks in a primary fashion. However, since > this is > open source, I won't prevent you from trying =-) Try the following > patch: Thank you very much. It works, and very well indeed. I'm getting very good performance. What kind of problems could I expect from this setup? Borja. > > I do believe that Dell does sell a direct attached disk option for > the 2950/1950 called the PERC5/e. It's essentially an LSI MPT-SAS > controller that directly replaces the PERC5/i card that you have now. > It should be able to control all 6 disk slots, and can do both SAS > and SATA. > > Scott > > > > Borja Marcos wrote: >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA1 >> Hello, >> I'm trying to set up a machine with FreeBSD 7, using ZFS, and I'm >> running into problems. >> The machine is a Dell Poweredge 2950, and includes a PERC/5i card >> and six disks. As I'm using ZFS I don't >> need the array functionality at all, and it's actually causing >> problems if I just create six logical volumes. >> I have seen that there is a "mfip" device that works as a >> passthough, so I have tried to destroy the six >> logical volumes I had created. Using the GENERIC kernel I had >> installed with the distribution (which includes >> the mfi driver) I've loaded the mfip module from the boot command >> line. >> After booting, a "camcontrol devlist" shows the six disks, but >> only as "passthrough devices". How can I make >> them be attached as disks? I've tried to use the "da" driver >> (using device.hints) but I have been unsuccessful. >> Unfortunately Dell doesn't sell a non-array option for this >> machine supporting 6 disks. The non-array option, which >> I think is based on SATA, supports only four. >> Any ideas? The PERC/5i plain sucks for this purpose. I tried to >> unplug one of the disks (remember that I have a separate >> logical volume for each disk) and the card renumbered the rest of >> the logical disks, making the ZFS pool unusable until >> I rebooted, erased the PERC config, and recreated the six logical >> volumes. >> Thank you very much, >> Borja. >> -----BEGIN PGP SIGNATURE----- >> Version: GnuPG v1.4.1 (Darwin) >> iD8DBQFHJ1i+ULpVo4XWgJ8RAnxfAKCfLueqEI8ow79d6lIt2RJepKuo6wCgwrCs >> pp9zXb9QAtUnHo4kyn70WE8= >> =gydj >> -----END PGP SIGNATURE----- >> _______________________________________________ >> freebsd-scsi@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-scsi >> To unsubscribe, send any mail to "freebsd-scsi- >> unsubscribe@freebsd.org" > > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (Darwin) iD4DBQFHKLDcULpVo4XWgJ8RAkQlAJ4rwsHzELh81GDGV9x/wA0iJRsmxgCXUS6m SwnG1t0LJWTIDcUYfKFmWg== =z+yj -----END PGP SIGNATURE-----
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