10
Scorpion 40 DDS-4 Product Manual, Version A
Drive Performance Specifications
The following table lists the specifications for the Scorpion 40 drive.
Specification Value
Capacity
90 m MP
120 m MP+
125 m MP++
150 m MP+++
4.0 Gbytes
8.0 Gbytes
24.0 Gbytes
40.0 Gbytes
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 10
15
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 Kbytes per sec (DC ON)
Synchronous transfer rate (burst) 80 Mbytes per sec max
Asynchronous transfer rate (burst) 10 Mbytes per sec max
Search speed (max) 400x normal (3260 mm per sec)
Average access time
90 m cartridge
120 m cartridge
125 m cartridge
<30 sec
<40 sec
<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.
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