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Ch 2: Installation and Use of Devices
Hitachi PC VisionBase8450H/R Server 7
Internal DAT and Internal DAT Changer (Optional)
• Data cartridges usable in an internal DAT and internal DAT changer are:
The formatting modes of 60m/90m tape, 120m tape, and 125m tape differ from each other. When you use drives
incompatible with each other, check the formatting modes corresponding to the drives, then decide on the tape
length for the cartridge.
• The standard service life (number of uses) of a cartridge used in an internal DAT changer is 160 times. If the
number of uses exceeds 160, replace the cartridge with a new one.
• To minimize condensation, note the following:
- Use cartridges in a temperature range of 10 to 35°C and a relative humidity range of 20 to 80%.
Storecartridges containing data in a temperature range of 5 to 32°C.
- If the cartridge to be used has been placed somewhere that exceeds the allowable temperature range, leave
it at ordinary room temperature at least two hours before use.
Use of a cartridge with its service life exhausted could cause a drive failure or data destruction.
While not in use, remove the cartridge from the equipment. If you leave the cartridge inserted, its
service life will be shortened.
Only Hitachi products are guaranteed. If products of other companies are used, operation cannot be
guaranteed.
Tape length (format) Memory capacity
60m tape (DDS-1)
1.3GB (uncompressed) to 2.6GB (compressed
1
)
1 It is assumed that the average data compression ratio is 2.0. (The data compression ratio
depends on transfer data.)
90m tape (DDS-1)
2.0GB (uncompressed) to 4.0GB (compressed
1
)
120m tape (DDS-2)
0GB (uncompressed) to 8.0GB (compressed
1
)
125m tape (DDS-3)
12GB (uncompressed) to 24GB (compressed
1
)