HP StoreEver TapeAssure Software - Manual (Page 106)

tape)
||_ Channel variation: 0.0% Channel variation margin: 100.0%
||_ Offtrack count: 0 CCQ rewrite percent: 0.1%
||_ 3.8 m/sec. tape speed:Effective capacity:94.6% Margin: 98.5% (3.0/3.0 GB written using 128.1 meters of
tape)
||_ Channel variation: 0.0% Channel variation margin: 100.0%
||_ Offtrack count: 0 CCQ rewrite percent: 0.1%
||_ 4.2 m/sec. tape speed:Effective capacity:94.6% Margin: 98.4% (3.0/3.0 GB written using 128.1 meters of
tape)
||_ Channel variation: 0.0% Channel variation margin: 100.0%
||_ Offtrack count: 0 CCQ rewrite percent: 0.1%
||_ forward direction:Effective capacity: 95.1% Margin: 100.0% (10.3/10.3 GB written using 594.6 meters of
tape)
||_ Channel variation: 0.0% Channel variation margin: 100.0%
||_ Offtrack count: 0 CCQ rewrite percent: 0.1%
||_ reverse direction:Effective capacity: 94.3% Margin: 96.6% (10.3/10.3 GB written using 599.5 meters of tape)
||_ Channel variation: 0.0% Channel variation margin: 100.0%
||_ Offtrack count: 0 CCQ rewrite percent: 0.1%
||_Overall drive margin:98.3%
||_Worst-case margin (reverse direction):96.6%
Each characterized speed or direction shows:
•
Effective capacity — the proportion of tape used that contains the written data. There is a
theoretical possibility of 100%, but some redundancy is to be expected. Anything over 50%
shows a working drive. The pass level is 80%.
•
Margin — normalizes the effective capacity to between 0% and 100% such that greater than
0% is a pass and 100% is the realistic maximum.
•
Amount of data written compared to the amount attempted.
•
Amount of tape used to write the data.
•
Channel variation — a percentage comparison across all the heads (16 or 32 depending on
the drive technology)
•
Channel variation margin — normalizes the channel variation to between 0% and 100% such
that greater than 0% is acceptable (a pass) and 100% is no variation at all.
•
Offtrack count — the number of times the drive had to react to a track following issue. An
offtrack is not an error, but more offtracks will make it harder for the drive to operate within
expected limits.
•
CCQ rewrite percent — an internal measure of write redundancy. Another indicator of health.
Anything up to 20% is within limits.
The summary shows a normalized margin figure for the drive overall and also highlights the worst
margin figure from all of the characterizations. This is the key data from the test.
NOTE: The textual output of the test will give the ultimate summary — PASS or FAIL. The test
results can be emailed to HP support for confirmation.
Autoloader Exerciser test
Description Checks the mechanics of your DDS autoloader.
NOTE: For instructions on how to perform this test, see Running the
tests (GUI) (page 40) or Running the tests (CSI) (page 73) .
When to run Run this test when you want to verify that the mechanics of your DDS
autoloader are working properly.
Average duration ~ 10 minutes
Other notes Test will not overwrite any data on the media.
Available for DDS autoloaders
106 Tests and utility functions