G-Technology G-RACK 12, User Manual

Page: 50 / 296

Administrative Tool
p. 50
Type Choose type of test.
Short self-test
The goal of the short test is the rapid identi-
fication of a defective hard drive. Therefore, a
maximum run time for the short test is 2 min.
The test checks the disk by dividing it into three
different segments. The following areas are
tested:
•
Electrical Properties: The controller tests its
own electronics, and since this is specific to
each manufacturer, it cannot be explained
exactly what is being tested. It is conceiv-
able, for example, to test the internal RAM,
the read/write circuits or the head electron-
ics.
• Mechanical Properties: The exact sequence
of the servos and the positioning mecha-
nism to be tested is also specific to each
manufacturer.
• Read/Verify: It will read a certain area of the
disk and verify certain data, the size and
position of the region that is read is also
specific to each manufacturer.
Long self-test
The long test was designed as the final test in
production and is the same as the
short test
with
two differences
. There is no time restriction
and in the Read/Verify segment the entire disk
is checked and not just a section. The Long test
can, for example, be used to confirm the results
of the short tests.
Conveyance self-test
This test can be performed to determine dam-
age during transport of the hard disk within just
a few minutes.
Offline immediate self-test