Apple Workgroup Server 8150/110 - Manual (Page 65)

You need to read this chapter only if your server includes an internal tape-
backup unit.
The internal DDS-2 DAT drive and accompanying software can perform full or
partial backup and restore procedures for all of the data on your hard disks. In
addition, the drive automatically performs error correction and data compression
of the files that you back up and restore. The error-correction feature helps
ensure a high level of data integrity. The data-compression feature allows more
data to fit on a cassette than do conventional backup mechanisms.
Use Retrospect Remote (or some other backup utility) to back up and restore
data. For more information, see the utility’s documentation.
5
Using a DAT Drive and Tape Cassettes