Summary of Contents for Mitsubishi Electric Apricot HP DDS DRIVES
HP DDS DRIVES User Guide NATIONAL ACCREDITATION OF CERTIFICATION BODIES...
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USING A HP DDS TAPE DRIVE This document describes the HP DDS-2/3 tape drives. The software needed to control the drives depends on your operating environment; ask your supplier for details. The drive has a built-in compression algorithm which can typically double, and in some cases quadruple, tape capacity.
cassette again. If the warning persists, copy the data onto a new cassette and discard the old one. The media caution signal will clear when a new cassette is loaded or when the drive is switched off and then back on. A media caution signal can also indicate that a prerecorded audio DAT cassette has been inserted by mistake.
into the drive mechanism. A load sequence checks ambient humidity, the tape format and data integrity. Unless the tape is blank the tape log, which contains a history of usage of the tape, is read into the drive’s memory. The drive will automatically format a blank tape when data is first written to it.
Keep your cassettes well away from magnetic objects, and equipment that generates magnetic fields. Avoid extremes of temperature and exposure to direct sunlight; otherwise, the data recorded on the tape may become corrupted WRITE WRITE PROTECT ENABLED Cleaning the drive The read/write heads in the tape drive are protected during normal operation by a built-in cleaning roller.
Setting the SCSI ID The SCSI ID is set using jumpers on the set of pins beside the SCSI connector at the rear of the drive, as shown below: Compression on/off, using a control cable Bit 0 Bit 1 Bit 2 Term power SCSI connector Power connector...
Pin State Effect Unconnected This is the default. Data compression is controlled by configuration switches 1 and 2 (on the underside of the drive) and through the SCSI MODE SELECT command. Connected to 0V Data compression is disabled. The setting of configuration switch 1 is ignored.
Note For the drive to operate correctly, appropriate drivers and application software must be loaded on the host computer. Data compression Switches 1 and 2 are normally a used to configure the way in which data compression is set for the drive. The following table shows the available options: Switch 1 Switch 2...
Switches 4 to 8 Switches 4 to 8 are used to specify connectivity and functionality according to host or customer requirements. The default settings for all switches is on. HP DDS DRIVES USER GUIDE 9...
Specification of HP DDS tape drives Performance specifications apply when using data compression. Power specifications are measured at the tape drive power connector and are nominal values. The compression ratio and transfer rate achievable in any particular case depend on the characteristics of the data being compressed.
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