HP Command View for Tape Libraries Software - Manual (Page 96)

Table 30 Information available from the LTO Tape Properties window Last Used Drive tab
(continued)
Description Item
An estimate of the percentage of remaining drive
load/unload life based on the number of load/unload Load/Unload Life
cycles over the life of the drive compared with worst
case life expectancy testing in a clean environment. HP
recommends HP media for increased load/unload life.
If a life warning is shown, the drive should be replaced
at the next maintenance period. HP recommends HP
media for increased load/unload life.
Usage Statistics
Total power on time of the drive since it was
manufactured. Power On Time
Total tape pulled through the drive expressed in terms
of the equivalent number of full volume writes or reads. Tape Pulled
Total number of tape loads for the drive since it was
new. Load/Unload Cycles
A comparison of the time the tape was in the drive with
the time since the time it was loaded and the following Percent Tape Loaded
tape load expressed as a percentage. For example, if
the time between the two tape loads was 4 hours and
this tape was in the drive for the first hour of that time
then the tape loaded percent will be 25%. Use this for
measuring utilization of the drive from the application
standpoint.
Duty cycle of the drive since the last tape load. This is
a comparison of the time the drive has been active with Duty Cycles
the time since the last tape load expressed as a
percentage. For example, if the last tape load was 4
hours ago and the drive has been active for 3 hours
since then, the duty cycle will be 75%. Use this for
measuring utilization from the hardware standpoint.
Number of drive power cycles since the drive was
manufactured. Power Cycles
Number of times the drive has been cleaned since it
was manufactured. Cleans
The number of times the drive has been updated with
firmware. Firmware Upgrades
Internal Temperature
The current temperature reported by the sensor located
on the drive controller board. The current temperature Current Temperature
value will be significantly higher than ambient
temperature but dependent on it, as well as drive usage
and air flow. The algorithm that assesses whether the
drive is in specification takes account of the location of
the sensor and uses that to estimate the thermal
conditions of the tape path.
If a warning is shown, the airflow for the drive should
be improved. If this cannot be corrected, contact HP
support. Note that a warning will normally trigger an
alert.
The maximum operational temperature reported by the
sensor located on the drive controller board since the Max Temperature (since last power cycle)
last power cycle with an assessment of whether the
96 Command View TL GUI