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 at gmail.com