OS6 Data Recovery - How to Mount BTRFS Volumes

JMehring wrote:
If you have an array of 6 disks, do they need to be placed on the same disk device port (/dev/sdaX) as on the ReadyNAS or is mdadm smart enough to figure that out?

It shouldn't matter but you should keep the order the same where possible. It would be a good idea to note down the order e.g. note which serial number is for disk 1 etc.

JMehring wrote:
Since I need to do a factory reset anyway and I have 6 other disks sitting around I figure I could just move the 6 disks that are in the ReadyNAS to a PC instead of doing a backup, then once I populate the ReadyNAS with 6 new disks I could just restore from the PC using the original disks.

That's not recommended. If the NAS is working it would be better to do a backup.

kimera wrote:

Have I to pull out all involved ReadyNAS HDDs and push them in into a suitable Linux box (with enough SATA ports available) respecting exact ReadyNAS HDDs install order and exact HDDs quantity (so, as example, equipping the Linux box with HDD 1 and 2 from a RN102/312 fully filled or with HDD 1, 2, 3 and 4 from a RN104/314 fully filled) so to have, on the target Linux system, new devices sdb/sdc or sdb/sdc/sde/sdf (considering sda used by my Linux distribution for its OS)?

If you have four disks in the NAS and the array is fine, you would need at least three disks. If you had two disks in the array you would need at least one of them etc.

It's possible you might be able to mount the array putting the disks in e.g. USB enclosures.

I think the PC should be smart enough to tell which disks are in the array, but if not you could specify them manually.