Primary has 4 disks, dual redundancy, X-RAID2 Backup will have 2 disks, RAID-0 / mirror.
If I were to have one as a warm standby NAS, which had only 2 disks configured as Raid 0 (Basically mirroring the primary). If the primary NAS were to fail due to some kind of non disk related failure, could I simply pull the 4 disks out of the primary, shutdown the backup and insert them in same order, then power it on? The expectation being that the device would just boot up and perform as the old primary.
I know in theory this should work but then the RAID setups of the 2 devices are different.
Yes. You would need to remove the disks from the backup NAS before moving the disks across from the primary. It also a good idea to run the same firmware on both NAS units.
There is a FAQ entry on migrating disks from one NAS to another.
You would be able to do this as long as both NAS are x86 platforms. The configuration (including RAID setup) is in the OS partition of the drives, and is not stored in the NAS flash.
You would want to make sure the firmware is synced between the primary and the backup.
BTW, on the backup machine: If you use RAID-0 to aggregate both disks, then a failure of either disk destroys the entire array. It would be more robust if you have one volume on each drive. It is a bit more trouble when creating the backup jobs, and you do need to balance the space between the two volumes manually. However, if a disk fails you'd still have half the data on the backup if you keep the drives independent.
