Oracle ZFS Storage Appliance: [Fibre Channel] A decrease in PCIe link bandwidth has been detected.

Asset ID:	1-72-2286655.1
Update Date:	2017-07-17
Keywords:

Solution Type Problem Resolution Sure

Solution 2286655.1 : Oracle ZFS Storage Appliance: [Fibre Channel] A decrease in PCIe link bandwidth has been detected.

Applies to:

Sun ZFS Storage 7120 - Version All Versions to All Versions [Release All Releases]
Sun ZFS Storage 7420 - Version All Versions to All Versions [Release All Releases]
Oracle ZFS Storage ZS3-2 - Version All Versions to All Versions [Release All Releases]
Oracle ZFS Storage ZS4-4 - Version All Versions to All Versions [Release All Releases]
Oracle ZFS Storage ZS5-4 - Version All Versions to All Versions [Release All Releases]
7000 Appliance OS (Fishworks)

Symptoms

A problem is listed under Maintenance > Problems reporting, "A decrease in PCIe link bandwidth has been detected."

If the Phone Home service is enabled, an Automatic Service Request (ASR) may also be generated with the following summary,

Summary: Potential performance degradation for the devices associated with this fault.

Fault event description: A decrease in PCIe link bandwidth has been detected.

Cause

These alerts are often due to events outside of the storage appliance.

Events on the SAN can trigger a perceived drop in the bandwidth of a Fibre Channel card.

Solution

Verify that a Fibre Channel card is installed.

:> maintenance hardware select chassis-000 show

...
slot-002 PCIe 1 ok Sun Microsystems, Inc. 2x8Gb Fibre Channel unknown
slot-003 PCIe 4 absent - - -
...

Mark the problem as repaired.

:> maintenance problems show

problem-000 Major fault A decrease in PCIe link bandwidth has been detected.

:> maintenance problems select <problem-id> markrepaired

Monitor for a return of the problem.

If the problem returns, please open a service request for Oracle Global Support to address this issue.

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