Drive-performance specifications, Environmental requirements – IBM 4690 User Manual
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Drive-Performance Specifications
The following table lists the performance specifications for the tape drive .
Drive Performance
Feature
Specification
Capacity
4.0 GB, 900 Oe
2
740 feet Travan cartridge
Effective backup rate
30 MB per minute typical
Data transfer rate
300/450/600 KB per second
Tape speed for Read/Write and
Search/Rewind
33, 51, or 77 ips
90 ips maximum
Recording method
Serpentine
Recording format
QIC 3095MC
Recording code
1,7 RLL
Error recovery
Reed Solomon ECC
Recording unrecoverable errors
Less than 1 in 10⁹ data Mb
Head configuration
Wide write/narrow read
Recording media
900 Oe 740 feet Travan
Cartridge size
3.2 in. x 2.4 in. x 0.4 in.
(81 mm x 61 mm x 10.2 mm)
Synchronous transfer rate (burst) 5 MB per second maximum
Asynchronous transfer rate
(burst)
5 MB per second maximum
Soft errors
less than 1 in 10⁶ bits
Environmental Requirements
The following table lists the environmental specifications for the tape drive. You
can mount the drive either vertically or horizontally.
Environmental Requirements
Specification
Operational
Nonoperational
Temperature
+41° to +113°F
3
(+5° to +45°C)
−40° to +149°F
4
(−40° to +65°C)
Thermal gradient
1°C per minute
(no condensation)
20°C per hour
Relative humidity
20% to 80% noncondensing
3
5% to 95% noncondensing
4
Max wet bulb temperature
78.8°F (26°C)
No condensation
Altitude
−1000 to +15 000 feet
−1000 to +50 000 feet
2. Oersted (Oe)
3. Mechanism and media
4. Mechanism
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TR-4 Tape Drive User’s Guide