Scott Silva wrote:
If you have a disk with several partitions set up as members of a
raid1 md devices, can you make a dd image of that disk to replace its
matching drive with identical partitions or are there differences
between the mirrored partitions?
you can 'dd' the MBR and then re-add the partitions to the raid for
resyncing with 'mdadm'.
# dd if=/dev/sda of=/dev/sdb bs=512 count=1
# mdadm /dev/md0 --add /dev/sdb1
# mdadm /dev/md1 --add /dev/sdb2
If you want to really make sure you got everything you could dd the
whole first track with:
# dd if=/dev/sda of=/dev/sdb bs=512 count=63
-Ross
Or sfdisk -d /dev/sdX | sfdisk /dev/sdY
where x is source and y is the target.
This will work across drives that have slight geometry differences.
What I was hoping to do was to take the grub setup, the partitioning
info and the contents in one shot and have the disks pair automatically
when booted. They didn't - but I think the other parts worked.
Now, is there a way to change the uuid on a running raid1 set? I'd
prefer that if the split and re-paired disks ever find their way back to
the same machine that they not sync again.
--
Les Mikesell
lesmikesell@xxxxxxxxx
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