AT&T 3B2/300 Technical Reference Manual page 211

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60-MEGABYTE CARTRIDGE TAPE DRIVE (KS-23417,L2)
The 60-Megabyte Cartridge Tape Drive is used as a streaming device for mass storage of data. As
the name suggests, the drive provides 60-megabytes of formatted storage capacity. Formatting of the
tape is not necessary because no Volume Table of Contents (VTOC) is used.
The drive may be an internal part of the 3B2 computer cabinet or it may be a separate SCSI
peripheral. Either way, connection to the 3B2 computer is via a SCSI Host Adapter card.
60-Megabyte Cartridge Tape Drive Equipment Characteristics
Physical.
Tape
Tracks
Tape Speed
Recording Density
Formatted Size
Height
Width
Depth
Operational.
Interface
Transfer Rate
DC600A cartridge tape (or equivalent)
9
90 inches per second
8000 bits per inch (nominal)
125,604 blocks (512-byte blocks) total
3.25 inches
5.75 inches
8.0 inches
SCSI (34-pin connector)
720 kilobits per second (sustained)
EQUIPMENT DESCRIPTION 2-187