On 31/08/2009, at 1:11 PM, Christopher Chan wrote: > Miguel Medalha wrote: >>> Can someone please assist met with some software RAID 1+0 setup >>> instructions? I have searched the web, but couldn't find any. I >>> found >>> a lot of RAID 10 setup instructions, but it doesn't help me. >>> >>> >> >> As Oliver Ransom replied to you, RAID 1+0 (not to be confused with >> RAID >> 0+1) is RAID 10. mdadm has direct support for RAID 10. I am using >> it on >> CentOS 5.3 and it works really well. >> > RAID 1+0 is NOT RAID 10. raid 1+0 is achieved using the combination of > raid1 and raid0 personalities. Raid10 is a different animal and has > its > own personality. (personality as reported by 'cat /proc/mdstat' aka md > modules) > > raid10 was only introduced in 2.6.9 and Oliver's link clearly shows > that > it is 'Non-standard' or not raid1+0. RAID 10 and 1+0 are referred to interchangeably in the Nested_RAID_levels article, "RAID 1+0, sometimes called RAID 1&0, or RAID 10". I'm a bit confused now! > > >> You might be interested in this article: >> >> "Why is RAID 1+0 better than RAID 0+1?" >> http://aput.net/~jheiss/raid10/ >> > > > The whole raid1+0 or raid0+1 argument was really only relevant in the > days of pata when one disk dying on one channel might take out the > other > disk on the same channel or the controller. Now that we are using > SATA, > it is MOOT. > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos