EVA4400 SAN - GOOD decommissioned DISK as replacement spare?

[Paultesp]

Is it possible to install a DISK from a decommissioned/ offline drive enclosure which had an initialized system and disk array, into an online disk array which has a failed disk?

Question/ reiteration/ considerations/ points:

-the disk was in a production disk enclosure but has been made redundant... we're now considering the disk; and the other 11, for spares to be installed into an online array.

-the disk has data on it and may have RAID volume META data as content.

Thought experiment:

-a disk has failed in an online array and automatically been ungrouped then removed, physically.

-disk array has migrated data and is ready for a replacement.

-if one of the decommissioned disks are installed, will it show as an ungrouped disked which can then be grouped with the disk array;

or;

-will the SAN controller read the data from the disk, read that it already is part of a disk group, then break the array?

[Greybeard]

It will show as ungrouped if hot plugged, if you install it while the system is down then the metadata will be read on boot and create errors.