Dell PowerVault MD3620f Command Line Interface Manual page 192

Parameter
testID
patternFile
192
Script Commands
Description
Identifier for the diagnostic test to run.
The identifier and corresponding tests
are:
1 — Reads the test
2 — Write test
3 — Data loop-back test
NOTE:
When you run a data loop-back test,
you can optionally specify a file that
contains a data pattern. If you do not
specify a file, the RAID controller module
firmware provides a default pattern.
File path and file name of the file that
contains a data pattern to use as test data.
Enclose the path and file name with
quotation marks (" ").