Technical information

2.2.15 TU81-Plus Tape Drive
The TU81-Plus is a reel-to-reel tape drive mounted in a 101.6-cm (40-
in) cabinet. The drive supports two industry-standard recording methods:
group coded recording (GCR)
and phase encoded (PE).
Storage Capacity
PE unformatted
PE formatted
GCR unformatted
GCR formatted
Functional Specifications
Recording media
Tape dimensions
Mode of operation
Recording methods
Recording density
Number of tracks
Ordering Information
TUS1E-DA
TUS1E-DB
Performance
Handling
Tape velocity
High speed
Low speed
Channel data transfer rate
PE high speed
PE low speed
GCR high speed
GCR low speed
Rewind time (731.5 m (2400 ft) tape on
26.7 cm (10.5 in) reel)
45.3 Mbytes
40.0 Mbytes
177
Mbytes
140 Mbytes
Magnetic
tape
1.27 em (0.5 in) wide, 731 m (2400 ft) long
Streaming
Group code recording (GCR)
Phase encoded (PE)
6250 bits/in (GCR)
1600
bits/in (PE)
9
TUSl-Plus tape drive, KLESI controller for 120 V
TUSl-Plus tape drive, KLESI controller for 240 V
Bidirectional reel-to-reel
190.5 cm/second (75 inlsecond)
63.5 cmIsecond (25 inlsecond)
120 Kbyteslsecond
40 Kbyteslsecond
469 Kbyteslsecond
156 Kbyteslsecond
2.75
minutes maximum
2-22 VAX 4000 Model 300 Technical Information