Date: Tue, 29 Jun 2004 19:51:31 -0500 From: Bob Willcox <bob@immure.com> To: "Kenneth D. Merry" <ken@kdm.org> Cc: randall ehren <randall@ucsb.edu> Subject: Re: Recommended RAID controller Message-ID: <20040630005131.GA79967@luke.immure.com> In-Reply-To: <20040630004653.GA20146@panzer.kdm.org> References: <20040629200454.GF70022@luke.immure.com> <022301c45e34$124700d0$0b936f80@net.isber.ucsb.edu> <20040630001830.GA79686@luke.immure.com> <20040630004653.GA20146@panzer.kdm.org>
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On Tue, Jun 29, 2004 at 06:46:53PM -0600, Kenneth D. Merry wrote: > On Tue, Jun 29, 2004 at 19:18:30 -0500, Bob Willcox wrote: > > On Tue, Jun 29, 2004 at 04:52:01PM -0700, randall ehren wrote: > > > > > on a side note, does anyone know if it's possible to initiate a RAID > > > rebuild > > > > > using these utilities? they seem to only allow the viewing or status, > > > but > > > > > not initiate any changes... > > > > > > > > I thougth that the rebuild would be initiated automatically when you > > > > plug in the new drive. Is that not so? > > > > > > nope. put a new drive in, can't reboot the machine until this weekend, been > > > like this for about 36 hours now... > > > > Bummer. Seems like that ought to be automatic. > > Well, if you're writing the RAID controller firmware, you'll often want > some user intervention prior to treating a newly inserted drive as a spare. > > What if the user accidentally plugged the drive into the wrong SCSI (or > SATA or FC or ATA) bus? > > What if the user just wanted to treat the new drive as a volume, and put it > on the controller so he could access it? > > What if you have 2 (or more) failed arrays, how do you decide which array > gets the spare? > > You get the idea. You want to ask the user before potentially overwriting > his data. There are probably some RAID boxes that do treat newly inserted > drives as spares immediately, but you pretty much need some sort of > standing policy on what to do with a "foreign" drive in that case. Hmm, all good points. Guess I was thinking about this from the standpoint of simple convenience and overlooking the risks. :-) Bob > > Ken > -- > Kenneth Merry > ken@kdm.org -- Bob Willcox Serocki's Stricture: bob@immure.com Marriage is always a bachelor's last option. Austin, TX
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