>> Does anyone have an idea what I have wrong here? This is my first >> software RAID install. Built a number of Centos servers without RAID >> and they have all worked fine. >> > > wild guess, md is still striping. try... I get this: [root at server ~]# mdadm -D /dev/md0 /dev/md0: Version : 0.90 Creation Time : Tue Dec 22 23:35:17 2009 Raid Level : raid1 Array Size : 104320 (101.89 MiB 106.82 MB) Used Dev Size : 104320 (101.89 MiB 106.82 MB) Raid Devices : 2 Total Devices : 2 Preferred Minor : 0 Persistence : Superblock is persistent Update Time : Sun Jan 3 04:38:15 2010 State : clean Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 UUID : fc5658f0:7ed7c190:9bc8468e:abc6d2ae Events : 0.16 Number Major Minor RaidDevice State 0 8 1 0 active sync /dev/sda1 1 8 17 1 active sync /dev/sdb1 [root at server ~]# mdadm -D /dev/md2 /dev/md2: Version : 0.90 Creation Time : Tue Dec 22 22:01:47 2009 Raid Level : raid1 Array Size : 1456645568 (1389.17 GiB 1491.61 GB) Used Dev Size : 1456645568 (1389.17 GiB 1491.61 GB) Raid Devices : 2 Total Devices : 2 Preferred Minor : 2 Persistence : Superblock is persistent Update Time : Tue Jan 5 16:44:38 2010 State : active Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 UUID : 94f6487b:cb068544:241217e2:db0f5e8a Events : 0.11 Number Major Minor RaidDevice State 0 8 3 0 active sync /dev/sda3 1 8 19 1 active sync /dev/sdb3