Quantum Scalar 50, User Manual

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Chapter 1 Library Description
Tape Drives
Quantum Scalar 50 User’s Guide 7
Table 4 HP LTO-4 (Half-
Height) Performance
Characteristics
* Compressed capacity assumes a 2:1 compression ratio.
Table 5 HP LTO-4
Performance Characteristics
If a drive experiences read/write errors when the
AutoClean
function is
enabled, the library issues an error message stating that drive cleaning is
required. Without user intervention, the library hand replaces the data
cartridge with a cleaning cartridge. When the cleaning procedure
finishes, the library hand returns the data cartridge to the drive.
Quantum Scalar 50 HP LTO-4 Half-Height Model
(drives/slots)
1/38
Capacity in Terabytes (TB) (800 GB per cartridge) 30.4
*Compressed Capacity in TB (1600 GB per cartridge) 60.8
Throughput (TB/hr) based on 80 MB/sec transfer rate (4
tape drives installed)
1.1
*Compressed Throughput (TB/hr) based on 160 MB/sec
transfer rate (4 tape drives installed)
2.3
Quantum Scalar 50 HP LTO-4 Model (drives/slots) 2/38
Capacity in Terabytes (TB) (800 GB per cartridge) 30.4
*Compressed Capacity in TB (1600 GB per cartridge) 60.8
Throughput (TB/hr) based on 120 MB/sec transfer rate (2
tape drives installed)
.864
*Compressed Throughput (TB/hr) based on 240 MB/sec
transfer rate (2 tape drives installed)
1.7
Note: When a cleaning cartridge has completed its 20-use limit, it is
automatically exported from the library, requiring a new one
to be loaded through the load port.