} -----Original Message----- } From: linux-raid-owner@xxxxxxxxxxxxxxx [mailto:linux-raid- } owner@xxxxxxxxxxxxxxx] On Behalf Of Ruslan Sivak } Sent: Friday, May 04, 2007 12:22 PM } To: linux-raid@xxxxxxxxxxxxxxx } Subject: raid10 on centos 5 } } I am trying to set up raid 10 and so far with no luck. I have 4 drives, } and Anaconda will not let me do raid 10. mdadm doesn't have the raid 10 } personality loaded. When I create the array manually like so: } } 2 drives in /dev/md11 as raid1 } 2 drives in /dev/md12 as raid1 } md11 and md12 in /dev/md10 as raid0 } } Everything looks fine from the shell, but anaconda only sees md11 and } md12. } } The only choice I see is to set up LVM over md11 and md12. Is this } really raid10? } } Russ You are making a RAID1+RAID0 array. Try making a real RAID10 array with 4 drives. This way you would only have 1 array with 4 drives. >From the mdadm man page: Currently, Linux supports LINEAR md devices, RAID0 (striping), RAID1 (mirroring), RAID4, RAID5, RAID6, RAID10, MULTIPATH, and FAULTY. Notice RAID10 is listed, use that. Man mdadm for more info. However, I would (and do) use RAID6. With RAID6 any 2 disks can fail without data loss. With RAID1+RAID0, any one disk can fail, a second failure has a 1 in 3 chance of vast data loss. I hope this helps, Guy - 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
