HP Surestore 2.28 Tape Library - Manual (Page 21)

1-9
Product Description
Specifications
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Specifications
Quantum DLT4000 and DLT7000 Drive
Mechanism Specifications
Table 1-5 DLT Drive Specifications
Characteristic DLT4000 DLT7000
Performance
Read/write transfer
rate:
maximum
sustained (DLTtape
Type IV) non-compressed mode:
1.5 MB/second
compressed (2:1 typical):
3.0 MB/second
non-compressed mode:
5.2 MB/second
compressed (2:1 typical):
10.0 MB/second
Average access time 68 seconds 60 seconds
Rewind 45 seconds (average)
90 seconds (maximum) 60 seconds (average)
120 seconds (maximum)
Loading time to
BOT (for
previously written
tape) 48 seconds (average) 48 seconds (average)
Unloading time to
BOT 17 seconds (average) 17 seconds (average)
External Interface 8-bit SCSI-2, differential 16-bit fast/wide SCSI-2, differential
Internal Interface 8-bit SCSI-2, single-ended 16-bit fast/wide SCSI-2, single-ended
Read-write head 2-channel, ferrite w/MIG 4-channel, ferrite w/MIG
Recording format 128 track serial serpentine variable
block (64 pairs)
256-tpi track density 208 track serpentine (52 quads)
416-tpi track density
Data compress
algorithm DLZ DLZ