- Digital Data Storage, also known (incorrectly) as DAT
or 4mm tape or drive. cf DLT. Tape capacities
Type Tape length Native capacity 1 Notional capacity 2 DDS-1 DDS-60 60m 1.3GB 2.6GB DDS-90 90m 2GB 4GB DDS-2 DAT 8 120m 4GB 8GB DDS-3 125m 12GB 24GB DDS-4 150m 20GB 40GB DDS-5 DAT 72 170m 36GB 72GB
- Native capacity is the amount of data that can be stored on the tape with no compression applied.
- Notional capacity (which is normally how vendors tend to rate the tapes and drives) assumed hardware compression of 2:1, but this will vary with real data.
For more information see:
- www.dds-tape.com - DDS Manufacturer's group web site.
- DAT or DSS? (archived)
- http://everything.explained.at/Digital_Data_Storage/ - Digital Data Storage (DDS) explained.