Chapter 1 Library Description
Tape Drives
Quantum Scalar 50 User’s Guide
5
Tape Drives
Scalar 50 tape libraries are equipped with either SCSI or native Fibre
Channel tape drives. SCSI buses are SCSI-2 fast/wide (8/16 bit), Ultra 3
SCSI, Ultra 160, or Ultra 320 SCSI, depending on the drives installed.
LVD SCSI configurations have a maximum allowable bus length of 12
meters. To determine the cable length of the bus, measure the lengths of
the SCSI cables connecting each device to that bus and add those lengths
together. To that total length, add 12.25 inches (31.10 cm) for the internal
SCSI cable length of each SCSI tape drive.
Tape Drive Types
1
The Scalar 50 tape library support the following tape drives:
• Quantum DLT-S4 (SCSI and Native Fibre Channel)
• Quantum Half-Height LTO-3 (SCSI and Native Fibre Channel)
• HP LTO-3 (SCSI and Native Fibre Channel)
• HP LTO-4 (SCSI and Native Fibre Channel)
• HP Half-Height LTO-4 (SAS)
Scalar 50 library can support mixed media types, mixed interface types
(Fibre Channel and SCSI) as well as mixed form factors within the same
library. Example: The Scalar 50 can contain both LTO full height drives
with LTO half-height drives in the same library.
Refer to the following tables for tape drive performance characteristics.
Both SDLT and LTO tape drive can exist in the same library as long as the
appropriate magazines are installed in the library.
Table 1 DLT-S4 Performance
Characteristics
Quantum Scalar 50 DLT-S4 Model (drives/slots)
2/32
Capacity in Terabytes (TB) (800 GB per cartridge)
25.6
*Compressed Capacity in TB (1600 GB per cartridge)
51.2
Throughput (GB/hr) based on 60 MB/sec transfer rate
(2 tape drives installed)
432
*Compressed Throughput (GB/hr) based on 120 MB/
sec transfer rate (2 tape drives installed)
864
Содержание Scalar 50
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