Drive performance test – HP StoreEver TapeAssure Software User Manual
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Performance Test to identify any system bottlenecks. Use a blank tape when performing this
test because this test is destructive to data on the tape. The test can also measure tape drive
read performance. This test is available for all tape drives. For more information, see
•
The System Performance Test measures the performance of the system on which the LTT Service
is running. It has two modes: The Read Performance Test measures the read performance of
the disk file system (simulating a backup), and the Write Performance Test measures the write
performance of the disk file system (simulating a restore). Use these tests in conjunction with
the Drive Performance Test to identify any system bottlenecks.
The Read Performance Test is read-only and is safe to run on any part of your file system. The
Write Performance Test creates data in the specified directory and can also be used to create
test data for general backup testing. For more information, see
Drive Performance test
The Drive Performance test writes and reads data to/from the specified tape drive and calculates
performance data for that drive. The results of the test are shown in updates while the test is running
and in the test results section in the bottom right of the Test/Utility screen.
CAUTION:
This test is destructive to data on the tape. To avoid loss of data, use a blank tape
when performing this test.
NOTE:
In the following procedure, a suggested starting value is given for most parameters. These
are not necessarily default values, but they are general values that will result in a simple,
representative test. Use them as a starting point, and modify them according to your needs.
NOTE:
The Drive Performance test uses the tape driver rather than the NT Miniport (or ASPI) to
model the backup application, so the appropriate tape driver must be loaded for this test. To
download the latest driver, go to
and click Download drivers and software.
1.
In the device listing (the By Product or By Connection tab), select the library or drive to test.
2.
Click Dev Perf on the main toolbar. The Drive Performance screen opens with the Tape Drive
Performance tab selected. For libraries, the Drive Performance Test tab shows the library and
its associated drives. For a stand alone drive, only a single drive will be shown.
3.
Select the tape drives for the Drive Performance test. All of the drives will be tested in parallel.
NOTE:
You cannot select the library because the test only runs on tape drives.
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. By default only one subtest is run.
The following data types can be selected:
•
Random — data that gives a 1:1 (or no compression) compression ratio
•
Zeros
•
1.6:1 Compression
•
2:1 Compression (suggested starting value)
•
3:1 Compression
•
4:1 Compression
Performance tests
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