Hi Mike Yep - the box is a Dell 1650 with Perc3 RAID on daughterboard so should be good for building the spare. Drives will be around 2 x 36 Gbyte so not too huge either. Regards Chris > -----Original Message----- > From: redhat-list-bounces@xxxxxxxxxx > [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Michael Wimpee > Sent: 19 August 2004 18:39 > To: General Red Hat Linux discussion list > Subject: Re: RAID on RedHat 3 ES > > On Thu, Aug 19, 2004 at 04:02:16AM -0500, Steve Phillips wrote: > > > > Software RAID comes with a preformance hit that with todays > processors > > you probably will never notice. > > > > RAID1 would be ok, if you are after rock solid redundancy then > > purchase another drive as a hot spare (and if your really > keen, try to > > ensure that the drives are nto from teh same production batch) > > > Be aware however, that under heavy I/O, a failed disk may take a > *really* long time to rebuild under software RAID. We saw > >150MB/s using four SCSI drives under software RAID 5, but > when testing rebuild speed, normal disk I/O caused the > rebuild time to get pushed out towards infinity. It wouldn't > have worked well in our situation so we went with a hardware > RAID controller. > > Mike Wimpee > > > comments like "dont know if it is really effective" are kinda wishy > > washy, effective against what ? was he saying that a single drive > > system would have greater redundancy than a mirrored setup > ? what sort > > of effect was he commenting on ? > > > > the preformance hit you will see will also depend on how many users > > and how busy you expect the server to be - also, buying > 5400rpm drives > > will probably not help much, try and get reasonably fast > drives with a > > reasonable ammount of cache ram. > > > > if you are after reliability only then there is no point to stripe > > (infact, some people claim that software stripes actually > slow things > > down over say - RAID 10) > > > > > > -- > > Steve. > > > > On Thu, 19 Aug 2004, kenwardc wrote: > > > > >Hi All > > > > > >Someone said to me today they didn't know whether RAID on > Linux was > > >very effective. Can someone tell me whether it's still > worth RAIDing > > >drives on Linux? I'm building a new mail server and I > wanted to put > > >in RAID 1 just in case of problems with drives etc. down the line. > > >Any advice appreciated. > > > > > >Also, provided the answer to the question is YES, is RAID > 1 the best > > >for a mail server or should I be looking at striping? I'm > obviously > > >not looking for the greatest speed but want absolutely reliable > > >redundancy. > > > > > >Regards > > >Chris > > > > > > > > > > > >--- > > >All messages scanned by AVG 7.0 Anti-Virus scanner and > TGIS Anti-Spam > > >Firewall. > > > > > > > > >-- > > >redhat-list mailing list > > >unsubscribe > mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > > >https://www.redhat.com/mailman/listinfo/redhat-list > > > > > > > > > -- > > redhat-list mailing list > > unsubscribe > mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > > https://www.redhat.com/mailman/listinfo/redhat-list > > > > > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list > > --- All messages scanned by AVG 7.0 Anti-Virus scanner and TGIS Anti-Spam Firewall. -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
