9 track tape
IBM generations

9 track tape

Section Title: IBM generations
Table Section Text: None

IBM Model	2400 Series	3400 Series

Model numbers	2401, 2415, 2420	3410, 3420, 3422, 3440

Density (bits/in/track)	800, 1600	800, 1600, 6250

Tape speed (in/s)	18.75–200	120–200

Transfer rate (B/s)	15,000–320,000	1,250,000

Interblock gap (in)	0.6	0.3

Rewind speed (in/s, avg.)

Start time (ms)

Stop time (ms)

Length of reel (ft)	2400 max	2400 max

Base composition	Plastic	Plastic

Sentence(s)

Nine-track tapes had densities of 800, 1600, and 6250.

final_sentence: Nine-track tapes had densities of 800, 1600, and 6250.