Specifications
Part number 5502682,5503132,5503371

Seagate DAT 20/40 GB DDS-4 Tape Drive Specifications
Capacity 90 m MP: 4.0 GB
120 m MP+: 8.0 GB
125 m MP++: 24.0 GB
150 m MP+++: 40.0 GB
Flux Density (DDS-4) 6,004 flux transitions per mm
Track Density (DDS-4) 147.34 tracks per mm
Error Recovery Read-after-write
Reed Solomon ECC (C3 - 3 levels)
Recording Unrecoverable Errors <1 in 1015 data bits
Tape Drive Type Computer grade 4DD mechanism
Head Configuration 2 read heads, 2 write heads
Recording Format DDS-4
Recording Method Helical scan (R-DAT)
Cartridge 2.9 in. × 2.1 in. × 0.4 in.
Transfer Rate (Sustained) 5.500 KB per sec (DC ON)
Synchronous Transfer Rate (Burst) 80 MB per sec (max)
Asynchronous Transfer Rate (Burst) 10 MB per sec (max)
Search Speed (max) 400x normal (3260 mm per sec)
Average Access Time 90 m cartridge: <30 sec
120 m cartridge: <40 sec
125 m cartridge: <40 sec
Drum Rotation Speed 10,000 RPM (all DDS modes)
Tape speed 20.375 mm per sec.
Head-to-tape speed 20.4 mm per sec.
Voltage Tolerance +12 VDC supply: ±10%
+5 VDC supply: ±7%
Operational Current +12 VDC supply: 250 milliamps (max)
+5 VDC supply: 1.35 Amps (max)
Standby Current +12 VDC supply: 15 milliamps (max)
+5 VDC supply: 1.2 Amps (max)
Surge (Peak) +12 VDC supply: 600 milliamps (max)
+5 VDC supply: 1.5 Amps (max)
Ripple (Peak-to-Peak) +12 VDC supply: <= 100 mV
+5 VDC supply: <= 100 mV
Temperature Operating: +41° to +113°F (+5° to + 45°C)
Non-operating: –40° to +149°F (–40° to + 65°C)
Thermal Gradient Operating: 2°C per minute
(no condensation)
Non-operating: Below condensation
Relative Humidity Operating: 20% to 80%
non-condensing
Non-operating: 0% to 90%
non-condensing
Maximum Wet Bulb Temperature Operating: 82.4°F (28°C)
Non-operating: No condensation
Altitude Operating: –100 to +4,575 meters
Non-operating: –300 to +15,200 meters (power off)
Nonrecoverable Error Rate <1 in 1015 bits
Error Recovery and Control Error-correction code techniques (C1, C2, & C3 ECC)
Read-after-write (RAW)
N-Group writing (DDS-1 and DDS-2 modes only)
Error monitoring and reporting (error log)
Retry on read
Data randomizer
Track checksum
Mean Time Between Failures
(MTBF)		 412,000 hr at 20% duty cycle
Mean Time to Repair
(MTTR)		 Less than 0.5 hours