Hewlett Packard Compaq StorageWorks (157769-B22) DAT Tape Drive The 20/40 GB DAT tape drive is available in internal, external, hot-plug and rackmount configurations. As the tape drive for entry-level and workgroup servers, this device offers 20 GB native capacity on a HP DDS-4 cassette with a transfer rate of 2.3 MB/sec. ??Advancements in tape technology have produced a tape drive that requires less cleaning and provides improved backup/restore operation. Some of these new advancements include an automatic, rotating, head-cleaning sweeper that is used during the write or read recovery procedure to dislodge debris in the recording heads and drum. This DDS-4 drive has a MTBF rating of 250, 000 hours at a 30% duty cycle.
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