I have a workstation with 8 drive bays and a MegaRAID SAS-3 3108 raid controller. 5 of the 8 bays are populated, and it is configured as a RAID5.
I need to expand my disk-space, and putting in 3 more identical drives wont cut it.
What I was thinking about doing is populating the open 3 bays with 3 new disks, configuring that as a RAID6, then cloning the system from the 5-drive RAID5 to the 3-drive RAID6. Then remove the 5-old drives, then put in new-drives and expand the 3-drive RAID.
What I've done so far;
1) I put in 3 new 8tb drives into the empty bays, and configured the raid 6 (wanted to make sure my raid card would support two independent raids).
2) I have this set up as an LVM, and think that will make it easier, and all I need to do is create a new pv, shrink the current vg to a matching size, then add the old vg to the new pv; https://askubuntu.com/questions/161279/how-do-i-move-my-lvm-250-gb-root-partition-to-a-new-120gb-hard-disk
3) What do I do about boot partitions? On my current raid5 I have;
Can I just clone these partitions in gparted to the new raid6, then change the boot location in the boot menu? Do I need to change UUIDs?
4) Anything else?