Date: Sun, 27 Nov 2005 22:31:08 -0700 From: Scott Long <scottl@samsco.org> To: user <user@dhp.com> Cc: freebsd-scsi@freebsd.org, "Kenneth D. Merry" <ken@kdm.org> Subject: Re: configuration choices with Dell CERC (adaptec 2610SA) Message-ID: <438A961C.2030504@samsco.org> In-Reply-To: <Pine.LNX.4.21.0511280018390.8180-100000@shell.dhp.com> References: <Pine.LNX.4.21.0511280018390.8180-100000@shell.dhp.com>
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user wrote: > > On Sat, 26 Nov 2005, Kenneth D. Merry wrote: > > >>>>It would be better to let the rebuild happen as fast as possible. Disks >>>>have a bad habit of failing in groups, and you don't want to increase >>>>the chance of a multi-disk failure by making recovery slow. >>> >>>So again ... only using mirrors ... and in a two-drive chassis, I can't >>>have a hot spare, so I am not sure if it even really matters what I set >>>that to ... comments ? >> >>If you only have a two drive chassis, your best bet is to replace a failed >>drive as soon as you can and let the rebuild complete as soon as you can. > > > > This Dell CERC (adaptec 2610sa) is the first card I have seen with this > rebuild-priority setting. Out of curiosity, of the three choices I have > (low medium high), which choice approximates the behavior that the older > cards (PERCs, etc.) had that _did not_ give you this choice ? > > Thanks so much for your (and everyone elses) great comments on this > thread. > > > The aac line of controllers have had task priority selection for at least the last 6.5 years that I've been using them. Maybe it's only now being exposed to someplace that you've noticed? Anyways, the default priority for all tasks is 'high'. Scott
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