If, like me, you still have to manage an old 2009 XServe with a RAID card and a RAID volume, you have to know a few things:
- The drives are hot-pluggable, yet the system won't see them until you reboot (maybe even twice) ;
- The RAID volume won't reconstruct itself automatically (and as expected). You have to actually mark the new drive as spare for the RAID Utility to finally use it and reconstruct the volume.
Not really the kind of hot-plug I'd expect.
Needless to say, I would have spent a pretty much better back-to-work-day if I'd knew that.