First take a complete backup of the md raid.

Then if the laws if Innate Perversity of Inanimate Objects you'll be able to
move the disks and have them just work. Your data is protected. (If you had
no backup IPIO would, of course, lead to the transition failing expensively.)

Even if IPIO does not work you restore from the complete backup to the same
disks they were on after the hardware RAID assembles itself. (Despite the
numerous times IPIO seems to work, I still figure it's a silly superstition.
It does lead to a correct degree of paranoia, though.)

{^_^}

On 2011/12/19 09:18, Felip Moll wrote:
> Well, I will remake my question to not scare possible "answerers":
>
> How to move a SL6.0 system with md raid (raid per software), to another server
> without mantaining the raid per software?
>
> Thanks!
>
>
>
> 2011/12/16 Felip Moll <[log in to unmask] <mailto:[log in to unmask]>>
>
>     Hello all!
>
>     Recently I installed and configured a Scientific Linux to run as a high
>     performance computing cluster with 15 slave nodes and one master. I did this
>     while an older system with RedHat 5.0 was running in order
>     to avoid users to stop their computations. All gone well. I migrated node to
>     node and now I have a flawlessly cluster with SL6!.
>
>     Well, the fact is that while migrating I used the node1 to install SL6 while
>     the node0 was hosting the old master operating system. Node1 has less ram
>     and no raid capabilities, so I configured a Raid5 per software when
>     installing, using md linux software (which comes per default to a normal
>     installation when you select "raid"). Node0 has a Raid 5 hardware controller.
>
>     Now I want to move the new master node1, into node0. I thought about this
>     and I have to shutdown node1, node0, and with a LiveCD partition the
>     harddisk of node0 and copy the contents of the disk of node1 into it. Then
>     make grub install.
>
>     All right but, what do you think that I should take in consideration
>     regarding to Raid and md? I will have to modify /etc/fstab and also delete
>     /etc/mdadm.conf to avoid md running. Anything more?
>
>     Thank you very much!
>
>