I added a new 4TB drive to my array, was not pre-cleared or anything, so that ran (took 6~ hours) then I was asked to format the drive, which I did.
I left it about an hour, and it still had not finished, so I left it overnight, as I wasn't sure if it was re-running any other operations in the background (formatting should be pretty quick at this point I guess?), it still hasn't finished formatting about 8 hours later.
I rebooted the system, hoping it would give me the option to retry the formatting etc, but it's booted up still formatting:
Not sure what I've managed to mess up here - but I don't want to go ripping the drive out and wiping it on a different system or something if I don't have to, also not sure if that would fix this or just waste another few hours.
Any help is much appreciated, Thanks!