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 Digital
audio tape (DAT):
High performance tape backup for servers and workstations, with capacities 2GB to
96GB.
Features
- Unlike QIC, the tape is recorded in one pass, but two read/write heads "pack"
the data.
- Digital Data Storage (DDS) is a storage format specifically
developed for the computer industry to provide improved storage methods using already
proven DAT (Digital Audio Tape) technology.
The DDS
(Digital Data Storage) format was developed by Sony and its industry partners to support
DAT drives as computer peripherals.
The objectives of DDS design were:
- To maximise storage capacity and performance
- To facilitate data interchange
- To provide fast random access to recorded data
This was achieved by taking advantage of helical scan recording
methods to improve capacity and reduce errors as well providing DDS, DDS-2 and DDS-3
standard formats to allow the interchange of tapes between manufacturers drives.
- DDS-2
- 8 Gbytes maximum in compressed mode
- DDS-3
- Final specs established in 1995. The ability to store up to 24 Gbytes of data in
compressed mode (12 Gbytes native). Data-transfer rates are up to twice as fast as DDS-2
with speeds up to 2.2 Mbytes per second.
- Segate Scorpion 96GB (Aug 1998)
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