On Thu, May 28, 2009 at 10:32:53AM -0400, Maxime Boissonneault wrote: > > Robin Hill a écrit : >> On Mon May 25, 2009 at 01:05:15PM -0400, Maxime Boissonneault wrote: >> >> >>> Hello, >>> I am using Ubuntu Hardy with 3x500GB drives and the following RAID >>> configuration : >>> >>> /boot is on a 100MB RAID1 >>> / is on a 30GB RAID0 >>> /home is on a 906GB RAID5 >>> >>> >> Ouch - why RAID0 for /? If you lose a single drive then all the >> configuration, etc. is down the drain. I'd suggest rethinking this >> while you're going through the rebuild process anyway. >> >> > That is why I do backups of / on /home regularily. I first did a RAID0 > for performance. I did some testing on performance of RAID0,1,5 and > RAID1 was pretty lousy (I put the results of my tests here : > http://cqed.physique.usherbrooke.ca/~mboisson/htpc.php?sec=raid_test ) > I guess I should have used a RAID5, but RAID1 seems like a terrible idea > considering the really bad performances. Hmm, why not use raid10,f2 for the / system? Then you will get almost raid0 read performance, while write performance is about half of raid0. A setup is described in http://linux-raid.osdl.org/index.php/Preventing_against_a_failing_disk You can do the / system with raid10,f2 with just 2 disks. Best regards keld -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
