Product manual

2 Scorpion 40 DDS-4 Product Manual, Version A
• The DDS recording format standard, ANSI/ECMA-139,
3,81mm Wide Magnetic
Tape Cartridge for Information Interchange - Helical Scan Recording - DDS
Format.
• 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.
Note: The Scorpion 40 can use 90-meter DDS-1 media but not 60-meter
DDS-1 media.
• 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 40 Capacity and Transfer Rates
The Scorpion 40 provides the following capacities and transfer rates, depending on
recording mode and tape length:
Recording Mode
DDS-1 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)
1,375
Kbytes/sec
1,375
Kbytes/sec
2,750
Kbytes/sec
2,750
Kbytes/sec
In data-compression mode, the Seagate Scorpion 40 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 40 drive
also offers synchronous or asynchronous SCSI transfers with a high-speed burst
data-transfer rate of 40 Mbytes per second.