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Scorpion 240 Product Manual
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The DDS-DC recording format standard, ANSI/ECMA-150,
3,81mm Wide
Magnetic Tape Cartridge for Information Interchange - Helical Scan Recording -
DDS-DC Format using 90 m length tapes.
•
The DDS-2 recording format standard, ANSI/ECMA-198,
3,81mm Wide Magnetic
Tape Cartridge for Information Interchange - Helical Scan Recording - DDS-2
Format using 120 m Length Tapes.
•
The DDS-3 recording format standard, ANSI/ECMA-236,
3,81mm Wide Magnetic
Tape Cartridge for Information Interchange - Helical Scan Recording - DDS-3
Format using 125 m Length Tapes.
•
The DDS-4 recording format specification from ECMA-288:
3,81 mm Wide
Magnetic Tape Cartridge for Information Interchange - Helical Scan Recording:
DDS-4 Format.
Note: For the latest ECMA standards, see the ECMA web site at
http://www.ecma.ch
Scorpion 240 Capacity and Transfer Rates
The Scorpion 240 provides the following capacities and transfer rates, depending on
recording mode and tape length:
Recording Mode
DDS DDS-2 DDS-3 DDS-4
Tape length 90 meters 120 meters 125 meters 150 meters
Capacity
(native)
2.0 Gbytes 4.0 Gbytes 12.0 Gbytes 20.0 Gbytes
Capacity
(compressed)
4 Gbytes 8 Gbytes 24 Gbytes 40 Gbytes
Transfer rate
(native)
915
Kbytes/sec
915
Kbytes/sec
2.75
Mbytes/sec
2.75
Mbytes/sec
Note: 60-meter DDS tape cannot be used with the Scorpion 240.
In data-compression mode, the Seagate Scorpion 240 drive typically doubles the
storage capacity and transfer rate of the native uncompressed operation. Tape
capacity and sustained data-transfer rate are dependent upon the characteristics of
the files being compressed, along with system parameters such as the speed of the
host, the operating system and the application software used. The Scorpion 240
drive also offers synchronous or asynchronous SCSI transfers with a high-speed
burst data-transfer rate of 80 Mbytes per second.
The Scorpion 240 provides superb reliability through three levels of error-correction
code (ECC) and the four-head design, which provides for read-after-write (RAW)
error detection and correction. The Scorpion 240 also includes a “flying” preamplifier
for greater signal-to-noise ratio.
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