I think the reason for the partitions not being on the same drive is because the old drive is the bootable drive and I changed the scsi ids of the drives to get it to work. I think it is using sba for the boot but centos is on sbb.
I just need to make sure that the sync happens so that the info on sbb is what is synced. The info on sba is 1 month old this I have confirmed by mounting sba3 and looking at the dates of the last emails received on the server I couldn't mount sdb3 because it is the active partition.
So from what your saying below running mdadm as you have shown will it copy the good info on sdb to sda?
I have to have this server ready for 7am or we will loose this contract. I can't believe I have spend all day on this.
Thanks for the help
If I copy over the wrong info they will lose 1 months worth of emails.
Mace
Les Mikesell wrote:
On Mon, 2006-05-01 at 23:18, Mace Eliason wrote:
Personalities : [raid1] md1 : active raid1 sdb2[0] 2048192 blocks [2/1] [U_] md2: active raid1 sdb3[0] 15623104 blocks [2/1] [U_] md0: active raid1 sda1[1] 104320 blocks [2/1] [_U]
That tells you that your raid devices were built with 2 partitions and now only have one active. It shows which member is active - note that they aren't all on the same drive. Assuming you have matching partitions on the other drive (do an 'fdisk -l' to make sure) and are sure the correct version is running now:
mdadm --add /dev/md0 /dev/sdb1 mdadm --add /dev/md1 /dev/sda2 mdadm --add /dev/md2 /dev/sda3
'cat /proc/mdstat' will show the re-sync progress. Don't reboot until the resync is complete and you see [UU] on all devices. When they have all completed, if you reboot cleanly the md devices will come up with both partitions active (but you don't have to reboot unless you want to test it).