Warren Young wrote: > 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 > Ok, so it stripping a mirror more redundant then, from what you say? But, it's limited to pairs of 4 HDD's, which means a bigger chassis, and a mobo / PCI controller that can support 8 HDD's if I want to add more? But, if I want to use 6+ drives, rather use RAID 6? How does RAID-6 perform in relation to RAID-5 or RAID-10 (RAID-01)? -- Kind Regards Rudi Ahlers CEO, SoftDux Web: http://www.SoftDux.com Check out my technical blog, http://blog.softdux.com for Linux or other technical stuff, or visit http://www.WebHostingTalk.co.za for Web Hosting stuff