Digital Data Storage
Generations

Digital Data Storage

Section Title: Generations
Table Section Text: None

Format	Date	Tape width (mm)	Track pitch (μm)	Tape length (m)	Native capacity (GB)	Capacity assuming 2:1 compression (GB)	Drum rotation speed (RPM)	Data transfer speed (MB/s)

DDS-1	1989	3.81	13.6	60/90	1.3/2.0	2.6/4	2000, 2551	0.183

DDS-2	1993	3.81	9.1	120	4.0	8	4000, 4400, 5737, 8500	0.360-0.720

DDS-3	1996	3.81	9.1	125	12.0	24	3825, 4252	<1.5

DDS-4	1999	3.81	6.8	150	20.0	40	11400	1.0-3.2

DAT-72	2003	3.81	5.4	170	36.0	72	8609.7, 10000	3.2

DAT-160	2007	8	6.8	154	80	160	6457	6.9

DAT-320	2009	8	153	160	320	12

(Gen 8)	canceled	8	~300	~600	≥16

Sentence(s)

DAT 160 uses 8 mm wide tape, while all prior versions of Digital Data Storage use, 3.81 mm wide tape.

final_sentence: DAT 160 uses 8 mm wide tape, while all prior versions of Digital Data Storage use, 3.81 mm wide tape.