Quantum Instruments DLT 7000 - Manual (Page 27)

General Description and Specifications
Quantum DLT 7000 Tape System 1-3
1.3.2 Interface Type
DLT 7000 tape drives are available with narrow SCSI-2 Fast/Wide (16-bit)
single-ended or differential interfaces.
1.3.3 Storage Capacity
The following table provides the ranges of capacity (native and compressed) for
the tape system, depending on which DLTtape cartridge is used.
Table 1 −2 DLT 7000 Storage Capacity
DLTtape Cartridge
(Length of Medium) Native Storage
Capacity
Compressed Storage
Capacity
DLTtape IV (extended
1780 foot tape) 35.0 GB User Data 70.0 GB User Data
(compressed 2:1)
DLTtape IIIx (extended
1780 foot tape) 15.0 GB User Data 30.0 GB User Data
(compressed 2:1)
DLTtape III (standard
1167 foot tape) 600 MB User Data*
2.6 GB User Data*
10.0 GB User Data
20.0 GB User Data
(compressed 2:1)
* The DLTtape III cartridge is the only cartridge that can be used by the DLT
7000 for 600 MB or 26 GB native capacity.
Note that a compression factor of as high as 2:1 can be attained, depending on
the data type and subject to the limitations of the SCSI bus design and the
configuration of the system in which the tape drive is installed.
1.3.4 Reliability (Projected)
Mean time between failures (MTBF) for the tape drive is projected to be 200,000
hours at 100% duty cycle. Head life is 30,000 tape motion hours.
Media durability is projected to be 1,000,000 passes of the tape medium across
the read/write heads (15,000 uses).
Quantum Corporation does not warrant that predicted MTBF is representative
of any particular unit installed for customer use. Actual figures vary from unit
to unit.