HP Library and Tape Tools - Manual (Page 95)

Figure 35 Drive Performance screen
3. Select the tape drives for the Drive Performance test. All of the drives will be tested in parallel.
4. Click the Options button to configure the test data in the Drive Performance Test dialog. To
return all of the options to their default values, click Defaults.
In the Test Logic section of the dialog, use the drop down menus to select a data type for each
of the four tests. The Drive Performance test is actually a series of four write/read subtests
(labeled Step 1-4 on the Drive Performance screen) that measure performance using different
types of data that you can specify.
The following data types can be selected:
•
Zeros
•
1.6:1 Compression
•
2:1 Compression (suggested starting value)
•
3:1 Compression
•
4:1 Compression
You must specify a data type for Step 1, but you can choose not to perform Steps 2 through
4 by selecting No Test (suggested starting value for steps 2 through 4 is No Test).
5. Specify the following additional parameters:
•
Block Mode —Choose one of the following (suggested starting value is Fixed):
Fixed —The test uses a fixed block size (length) that can be specified in the Block
Size menu.
◦
◦
Variable —The test uses a different mode of data transfer. When this option is
selected, the Block Size menu is disabled.
•
Block Size —If Block Mode is set to Fixed, specify the size of the data blocks used in
the test. Data blocks can be from 16K to 256K (suggested starting value is 64K). This
menu is disabled if Block Mode is set to Variable.
•
I/O Size —The maximum amount of data to be transferred by a single read/write
operation. This length is typically a multiple of the Block Size and ranges from the specified
Block Size to 1MB (suggested starting value is 1MB).
Performance tests 95