MDADM Software RAID on Ubuntu

Soldato
Joined
18 Oct 2002
Posts
12,876
Hi Folks,

I have a plex server at home with 3x 4TB m2 Drives. They're just on the machine as 3 separate storage drives, not linked in any way. One of them also has the OS on it and various apps.

I want to add 4 more 4TB m2 drives, and I'm going to do that using a PCIe Card.

I was going to:

- use MDADM to turn those new 4x4TB drives into a RAID 5 array
- move the media data off the 3x 4TB drive onto the new Array
- add 2 of the original 4TB M2s into that RAID 5 array....

.... and this is when I then get stuck.

Ideally, I'd add all the other 3 drives into that array, but if I do that, I'll wipe the drives and lose the OS etc.

Unless I can do something magical with a "live CD" to move the partitions on the boot M2 over, I think the only way I can do it is to clone the boot M2 onto a pair of spare 1TB SATA SSD Drives I've got, running them in an MDADM RAID 1 array, and then add the remaining M2 into the RAID 5 array.

I think I'm making something that should fundamentally be very simple just about as complicated as I possibly can, so any help hugely appreciated.
 
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