Dell PowerVault MD3220 Cli Manual page 156

Syntax
diagnose controller [(0 | 1)]
loopbackPhysicalDiskChannel=(allchannels | (1 |
2))
testID=(1 | 2 | 3)
[patternFile="filename"]
Parameters
Parameter
controller
loopbackPhysicalDiskChannel
156
Script Commands
Description
RAID controller module on which to run
the diagnostic tests. Valid RAID controller
module identifiers are 0 or 1, where, 0 is the
RAID controller module on the left and 1 is
the RAID controller module on the right
when viewed from the rear of the enclosure.
You must put brackets ([ ]) around the
RAID controller module identifier. If you do
not specify a RAID controller module, the
storage management software returns a
syntax error.
Physical disk channel on which to run the
diagnostic tests. You can choose to run
the diagnostics on all channels or select a
specific channel on which to run
diagnostics. Valid physical disk channel
values are 1 or 2.
NOTE:
When you run a data loopback test,
you can optionally specify a file that
contains a data pattern. If you do not
specify a file, the firmware provides a
default pattern.