User's Manual

omdiag: Using the Diagnostic Service 33
The diagnostics resume when the hard drive I/O activity has decreased. If the following message appears:
Device Inquiry command failed
it is likely that the hard drive is not connected properly. Check the cables to ensure that the hard drive is
properly connected to the controller. The hard drive may also fail and display the following message:
Device failed a send diagnostic command: Check cable connections and
termination and run this test again. If this error still occurs, it
may indicate a hardware problem.
To avoid this message, run the diagnostic when the system is experiencing light hard-drive I/O activity.
• Adaptec and LSI Blink Disk Light — Blinks the lights of a hard drive for 30 seconds to assist in locating
the hard drive.
omdiag storage sasdevdiag
Use the omdiag storage sasdevdiag command to test the SAS, SAS RAID controllers, and connected
devices. This test performs the following tests:
• Physical Integrity Test — Verifies the integrity of the physical layer of the SAS enclosure and its
connected hard drives. When a failure is identified, an error message will be displayed indicating that
an error has occurred. The detailed Phy error report log (Comma Separated Value, CSV file) is
available for Dell technical support personnel for further analysis. Prior knowledge of Phy is required to
interpret this log file. CSV files can be opened with common applications such as Microsoft Excel,
Open Office, and so on. Contact Dell technical support in case of repeated failures.
• Controller Log Test — SAS RAID controllers store all historical events in their memory. This test
exports the logs to a readable text file and Comma Separated Value (CSV) files. Entries in the
exported log file are intended for Dell technical support personnel. The messages in the log are
informational at the user level. Quick test will only retrieve entries since the last system boot. Using
the text or CSV files, Dell support personnel can analyze the logs to identify any potential failure of the
system. By default, the test runs for approximately 5 minutes. But in quick mode, it runs for
90 seconds.
• Enclosure Log Test — Enclosures store all historical events in their memory. This test exports the logs
to a readable text file and Comma Separated Value (CSV) files. Entries in the exported log file are
intended for Dell technical support personnel. The messages in the log are informational at the user
level. Using the text or CSV files, Dell support personnel can analyze the logs to identify any potential
failure of the system.
• Disk Self Test — Verifies the hard disks attached to a system through a qualified SAS or RAID
controller to determine if the hard disk has failed.
NOTE: The hard disk diagnostics are designed to run as a low-priority background task to limit the effect on I/O.
Because of their low priority, it is recommended that you limit hard disk activity while running the diagnostics. The
diagnostics may run slowly or even stop while hard disk I/O activity is running simultaneously.