HP StoreEver TapeAssure Software - Manual (Page 53)

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Read Quality — A measure of the ease with which data was read back from the most recently
loaded tape followed by the amount of data read from the tape since it was last loaded.
Even if the warning is given, the data will have been read back correctly (unless the drive
reported an error) though more error correction was required than recommended. Note that
a warning will normally trigger an alert
If appropriate, maintenance recommendations are made, such as to clean the drive and/or
replace the tape.
•
Head Life (% Life Remaining) — The percentage of remaining head life based on the amount
of tape passed over the head compared with worst case life expectancy testing in a clean
environment.
If a life warning is shown, the drive should be replaced at the next maintenance period.
•
Reposition Life (% Life Remaining) — The percentage of remaining reposition life based on
the number of changes in direction of the tape over the life of the drive compared with the
worst case life expectancy in a clean environment.
If a life warning is shown, the drive should be replaced at the next maintenance period.
•
Load/Unload Life — The percentage of remaining drive load/unload life based on the number
of load/unload cycles over the life of the drive compared with worst case life expectancy
testing in a clean environment.
If a life warning is shown, the drive should be replaced at the next maintenance period.
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Service Note — A recommendation for service based on the health criteria. More than one
service action may apply; hover over the entry with the mouse to see a tool tip containing all
recommended service actions for the drive.
Viewing drive performance
To access performance information for a specific drive:
1.
In the ALL LTT Service Hosts screen, select the service host associated with the tape drive.
2. In the left panel, click TapeAssure.
3. In the navigation panel under Drives, select Performance. A list of the tape drives managed
by the selected service host appears.
4. Double-click a drive name, or click on a drive name and then select Actions
→Properties.
The TapeAssure performance window lists:
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Serial Number—The serial number of the drive. This is a static value and will change if a drive
has been replaced. Use the serial number when contacting HP support.
•
Drive Type—The drive type including generation and interface type.
•
Library SN (or Hostname)—The HP serial number that uniquely identifies the library. Defined
at manufacture, this is the number to quote when contacting HP support.
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Media Transfer Rate—The transfer rate of the data, after compression, transferred to/from the
tape since the last load.
•
Estimated Host Transfer Rate—The estimated transfer rate of the host averaged over the data
transferred to/from the tape since the last load.
•
Write Compression Ratio —The average write compression ratio of the data written to tape
since the last load.
•
Read Compression Ratio—The average read compression ratio of the data read from tape
since the last load.
•
Last Sample Time—The local time when the key data was written to the database.
Viewing drive performance 53