I've never seen an audio cart used in a data
drive,
and we had a lot of customers using them..
Audio DATs don't have the media recognition burst, and will
be rejected by DDS drives.
DDS tapes used as audio DAT tapes overwrite the DDS data, and
are unusable as data tapes after doing that.
Early audio DAT recorders (TEAC DA-30) will accept 90M data tapes,
later TEAC drives will reject them. At one point we had about 6
DA-30's at KFJC, which have all developed transport problems after
using a lot of 90M data tapes in them.
We're slowly migrating 100's of DATs to optical or IDE disc media
because of the problems preserving data recorded to DAT.