Generations of DAT Digital Audio Tape DDS Digital Data Storage

DDS or DDS-1 backup tape media cartridgefrom a significant non-media technology
The first implementation of the DDS1 backup tapeenhancement: the debut of new highly efficient Partial
format used 60 meter tapes for a 1.3GB capacity.Response Maximum Likelihood PRML read channel
Capacity was upgraded to 2GB by extending thetechnology has been introduced. This contributed to
tape length to 90m, with no other changes in thefurther increased capacity.
tape formulation or the recording format.DDS-4 backup tape media cartridge
DDS-2 backup tape media cartridgeThe DAT technology reached the 20GB per cartridge
In order to increase the DAT technology, thethreshold with DDS4 backup tape media cartridge. In
capacity was increases from 2GB to 4GB in DDS2DDS-4 backup tape media cartridge an improved MP
backup tape cartridge. The media length wasmedia formulation was introduced along with longer
increased to 120m and a new higher coercivity MP+length tape. For handling the higher track densities of
formulation was introduced. a thinner tape wasthe DDS-4 format, a higher output MP formulation
required to reach the 120-meter target. DDS 2designated MP+++ was developed.
backup media tape was reduced to 6.9 um thickness,Fifth generation of DDS DAT 72
compared to 9.0 um for DDS-1 backup magneticDAT72 was built on the technology foundation of
tape.previous DDS media format. The native capacity of
DDS-3 backup tape media cartridgeDAT-72 is 36GB. In DAT72 backup tape media
The transition from DDS-2 to DDS-3 brought thecartridge new MP++++ formulation has been used.
largest capacity jump in the history of DATIn DAT72 the tape length was increased to 170
technology, a 3x improvement over the previousmeters. The recording density has been increased
generation. The DDS3 backup tape cartridge hasfrom 122 to 162 kbpi along with increased track
native capacity of 12GB. The DDS 3 format wasdensity.
derived from two key media improvements: aDAT160 the 6th generation of DDS
higher-coercivity (1700 oersted vs. 1530 oe) versionThe sixth generation of DAT 160 products have a
of the MP+ formulation used in DDS-2 media. Thenative capacity of 80GB and transfer rates in the
tape length was increased to 125m. The enhancedregion of 5MB/s.
magnetic properties of the higher coercivity MP++DAT 7th Generation
media supported a doubling of the linear bit densityThe DAT seventh generation will have native
to 122 kbpi.capacity of 150GB and native transfer rate of 8 MB
In DDS-3 backup tape media cartridge also benefiteds.