IBM System Storage DS3000 Programming Manual page 332

Parameters
Parameter
cacheBackupDevice
controller
diagnosticType
extendTestID
Extended Test Option
writePatterns
random
3-286
IBM System Storage DS3000, DS4000, and DS5000: Command Line Interface and Script Commands Programming Guide
Description
The identifier for the cache backup device on which you
want to run the diagnostic tests. Valid cache backup device
identifiers are 1, 2, 3, 4 or 5.
v 1 for USB1 on the controller circuit board
v 2 for USB2 on the controller circuit board
v 3 for USB3 on the controller circuit board
v 4 for USB4 on the controller circuit board
v all for all of the USBs on the controller circuit board
Note: If you have only one cache backup device, the all
identifier does not work. Enclose the identifier for the cache
backup device in square brackets ([ ]).
The controller that has the cache backup device on which
you want to run the diagnostic tests. Valid controller
identifiers are a or b, where a is the controller in slot A, and
b is the controller in slot B. Enclose the controller identifier
in square brackets ([ ]). If you do not specify a controller, the
storage management software returns a syntax error.
The level of diagnostic testing that you want to run on the
cache backup device. You can run one of these levels of
testing:
basic – This option validates the basic operation of the
ability of the cache backup device to store cache data. This
option determines these capabilities of the cache backup
device:
v Whether the cache backup device is write protected or the
cache can write data to the device.
v If the cache backup device is approaching its write cycle
limit.
extended – This option enables you to run more
comprehensive diagnostic tests on the host interface card.
This parameter selects the extended test option that you
want to run.
If you choose the extended parameter, you also must also
use the extendedTestID parameter and one of the extended
test options.
Description
This option writes a predefined pattern of data in blocks to
the entire cache backup device. Each block that was written
is then read back, and the data is verified for integrity and
accuracy.
This option writes a random pattern to each flash block in
the cache backup device.