E:unkown volume for path [/sbfs]

Just did a recovery on my Tab s 10.5 and I have run into s strange error,

-- Wiping data
Formatting /data
Formatting /cache
formatting /sbfs

E:unkown volume for path [/sbfs]
E:unknown volume "/sbfs"

Data wipe complete

I have searched for the error E:unkown volume for path [/sbfs] E:unknown volume "/sbfs" but there is no info (although a few people seem to be having it!) has anybody got any ideas?