120
P
RODUCT
M
ANUAL
1012581
A
PPENDIX
A—S
PECIFICATIONS
P
ERFORMANCE
S
PECIFICATIONS
This section describes the performance specifications for the autoloader.
D
ATA
T
RANSFER
R
ATE
The data transfer rate for the autoloader depends on the model of tape drive
installed, as shown in
Table A-3
.
T
APE
D
RIVE
P
ERFORMANCE
When installed in the autoloader, the tape drive performs within its
specifications. For more information about tape drive performance
specifications, refer to the LTO Ultrium documentation available from:
Hewlett-Packard—
www1.hp.com/storage/tapestorage/ultriumdrives.html
IBM—
www.storage.ibm.com/tape/lto/oem/index.html
A
UTOLOADER
P
OWER
-O
N
S
EQUENCE
T
IME
Each time the autoloader is powered on, it performs a sequence of activities.
During its power-on sequence, the autoloader:
Performs a power-on self-test (POST)
Runs self-diagnostics
Establishes communication with the tape drive
Verifies the SCSI IDs
Performs a cartridge inventory
The time required for the power-on sequence is measured from the time
power is applied until the autoloader indicates ready status.
Table A-3
LTO Ultrium tape drive transfer rate and capacity
Tape Drive
Maximum Data Transfer Rate
LTO Ultrium 2 26.6 MB per second (native), 187.2 GB per hour (compressed
a
)
a
Assuming a 2:1 compression ratio. Actual compressed transfer rate varies depending on the type of data
being recorded and the system configuration.
LTO Ultrium 3
b
b
When attached to an Ultra160 SCSI bus. All sustained data rates are dependent on the capabilities of the
SCSI bus (for example, an Ultra2 SCSI bus is limited to less than 40 MB/second).
This data is for the IBM full height LTO Ultrium 3 tape drive. For additional information, see
www.storage.ibm.com/tape/lto/oem/index.html
.
80 MB per second (native), 576 GB per hour (compressed
a
)
LTO Ultrium 3
c
c
This data is for the Hewlett Packard half height LTO Ultrium 3 tape drive. For additional information, see
www1.hp.com/storage/tapestorage.html
.
60 MB per second (native), 432 GB per hour (compressed
a
)
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