Dell PowerVault MD3420 - Manual (Page 216)

The testID parameter takes the following options, which you can use to verify that a RAID controller
module is functioning correctly:
• 1 — Reads the test
• 2 — Performs a data loop-back test
• 3 — Writes the test
The diagnostic tests consist of loop-back tests in which data is written to physical disks and read from the
physical disks.
Syntax
diagnose raidControllerModule [(0 | 1)]
loopbackPhysicalDiskChannel=(allchannels | (1 | 2))
testID=(1 | 2 | 3)
[patternFile=”filename”]
Parameters
Parameter Description
raidControllerModule RAID controller module on which to run the
diagnostic tests. Valid RAID controller module
identifier values are 0 and 1. The identifier value is
0 for the RAID controller module on the top and 1
for the RAID controller module on the bottom
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.
loopbackPhysicalDiskChannel 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.
testID 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
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