HP Command View for Tape Libraries Software - Manual (Page 62)

On the graph, the red, yellow, and green bands represent the critical, warning, and healthy status,
respectively, of the drive write health. The X-axis represents the barcode/cartridge serial number
and the Y-axis represents the write health of drive.
The table displays the barcode/cartridge serial number, the date/time, and the write health of the
drives of the tapes.
Use the Sample Time to filter the write health history for all the tapes loaded onto a drive between
the specified time intervals. In addition, each barcode/cartridge serial number is a link to the tape
write health history.
To export the report as a PDF, click Export Report at the bottom of the graph. This will allow you
to save the graph locally or email it. You can also export only the graphs or the complete report.
Life tab
A set of parameters decide the life of a drive and they deteriorate over time due to wear and tear.
Each backup leads to the generation of a Support Ticket that contains information about the quality
of the backup. These life parameters keep reducing with each backup. The Life tab shows the trend
of deterioration of the life parameters and recommends the action to be taken before the drive
becomes unusable.
The following are the life parameters of a drive and are compared to the HP recommended
specification:
•
DriveHeadLife – the remaining headlife of the drive
•
DriveLoadLife – the remaining load/unload life of the drive
•
DriveRepositionLife – the remaining reposition life of the drive
A simple regression is done on the historical data that the management station has collected over
a period of time for these life parameters. As a result, there is a trend line for each parameter. The
trend line with a greater slope value indicates that the parameter is deteriorating at a faster pace
than the others and determines the life of the drive (this parameter leads to the drive being unusable
faster than the other parameters). The screen displays the trend line of the parameter that is
degrading at the fastest pace. The trend line is then extrapolated to know when this parameter
62 Command View TL GUI