Seagate STD1401LW, Руководство по эксплуатации продукта

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2 DAT 72/DDS-4 Product Manual
The DAT 72 and DDS-4 drives support DDS data compression. Compression
doubles a drive’s uncompressed capacity. For example, a 20 GB uncompressed
drive will be 40 GB with compression.
The DDS-4 drive complies with the following guidelines and specifications:
•
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
The DAT 72 drive complies with the following guidelines and specifications:
•
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
•
The DDS 5th Generation recording format specification from the HP DAT 72
Format Standard A5969-3050-1:3,81 mm Wide Magnetic Tape Cartridge for
Information Interchange - Helical Scan Recording - DAT 72 Format Using 170 m
Length Tapes.
Note: For the latest ECMA standards, see the ECMA web site at
http://www.ecma.ch
DAT 72 and DDS-4 Capacity and Transfer Rates
The DAT 72 and DDS-4 drives provide the following capacities and transfer rates,
depending on the recording mode and the tape length:
Recording Mode
DDS-2* DDS-3 DDS-4 DDS 5
th
Generation
Tape length 120 meters 125 meters 150 meters 170 meters
Capacity
(native) 4.0 Gbytes 12.0
Gbytes 20.0 Gbytes 36.0 Gbytes
Capacity
(compressed) 8 Gbytes 24 Gbytes 40 Gbytes 72 Gbytes
Transfer rate
(native) 1.375
Mbytes/sec 2.75
Mbytes/sec 2.75
Mbytes/sec 3.54 Mbytes/sec
* Applies to the DDS-4 drive only.