I prefer raid level of ibm.... For Dell you can find more info about raid level at http://support.dell.com/support/edocs/storage/RAID/RAIDbk0.pdf But add hot spare disks.... Nightduke 2008/5/22, Warren Young <warren at etr-usa.com>: > Rudi Ahlers wrote: > > > > So, how does it perform with 6 discs for example? Say I have 3 HDD's in > RAID-0, and another 3 in RAID-0, then RAID-1 the 2 RAID-0 stripes. > > > > There's actually two kinds of RAID-10. Some like to say RAID-01 or RAID-1+0 > or things like that to distinguish them. It's a matter of whether it's > mirrors over stripes or stripes over mirrors. You're talking about mirrors > over stripes, but I'm talking about doing it the other way around. > > Your way has the advantage of letting you add disks in pairs, but to get > that you get only single-disk redundancy: if a second disk goes out, your > array is gone, no matter which disk it is. > > If you do it the other way, you have to use groups of 4 (two mirrors striped > together) but you get the advantage that with a single disk missing, you can > lose another if it's in the other mirror. Of course, if you lose two in the > same mirror, you're toast. > > > And what would you recommend on 8 / 10 HDD's? > > > > As I said, usually RAID-5 or -6 usually makes more sense with so many > spindles. If you're talking RAID-10 (my way) with so many disks, it starts > getting expensive with 8, 12, etc. > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos >