12TB USB drive stopped being recognized by ROCK

[BlackJack]

Sounds like you try to use an NTFS formatted drive with issues together with a device running Roon OS. See here how to resolve this if my guess was right:

NTFS USB drive not seen

I think you are confusing Roon 1148 vs Roon OS 254. Roon 1148 has nothing to do with NTFS. Roon OS 254 changed to a much more stable NTFS driver, but it’s pickier about improperly ejected drives (part of the stability effort). I had 2 people having similar issues plug the drive into Windows, run CHKDSK on Windows, and then eject the drive. When they plugged it into a Roon OS machine (1 was ROCK, 1 was Nucleus), it showed up. I asked your N+ for logs, but I can’t see the exact issue because th…