ZFS pool reported as degraded due to checksum errors on IR volume for Erie-Int.

Asset ID:	1-72-1676851.1
Update Date:	2018-03-27
Keywords:

Solution Type Problem Resolution Sure

Solution 1676851.1 : ZFS pool reported as degraded due to checksum errors on IR volume for Erie-Int.

Applies to:

Sun Server X3-2L - Version All Versions to All Versions [Release All Releases]
Information in this document applies to any platform.

Symptoms

Zpool FMA message:

fmadm faulty
--------------- ------------------------------------ -------------- ---------
TIME EVENT-ID MSG-ID SEVERITY
--------------- ------------------------------------ -------------- ---------
Apr 01 00:16:54 c0d289e6-a69b-4379-ce71-a2fc781666ae ZFS-8000-GH Major

Problem Status : solved
Diag Engine : zfs-diagnosis / 1.0
System
Manufacturer : Oracle-Corporation
Name : SUN-FIRE-X4270-M3
Part_Number : 32024631+1+1
Serial_Number : 1332FM5016
Host_ID : 000db8e6

----------------------------------------
Suspect 1 of 1 :
Fault class : fault.fs.zfs.vdev.checksum
Certainty : 100%
Affects : zfs://pool=f04be8f4f2b67459/vdev=a946a9acb26f1deb/pool_name=rpool/vdev_name=id1,sd@n600508e000000000fa7df22a1cd10403/b
Status : faulted but still providing degraded service

FRU
Name : "zfs://pool=f04be8f4f2b67459/vdev=a946a9acb26f1deb/pool_name=rpool/vdev_name=id1,sd@n600508e000000000fa7df22a1cd10403/b"
Status : faulty

Description : The number of checksum errors associated with ZFS device
'id1,sd@n600508e000000000fa7df22a1cd10403/b' in pool 'rpool'
exceeded acceptable levels.

Response : The device has been marked as degraded. An attempt will be made
to activate a hot spare if available.

Impact : Fault tolerance of the pool may be compromised.

Action : Use 'fmadm faulty' to provide a more detailed view of this event.
Run 'zpool status -lx' for more information. Please refer to the
associated reference document at
http://support.oracle.com/msg/ZFS-8000-GH for the latest service
procedures and policies regarding this diagnosis.

Cause

Zpool degraded on IR mirrored volume for Erie-INT PCI host bus adapter due to checksum errors.

Solution

Use sas2ircu utility and run consistency check on IR volumes and checking status for hardware healthy.
Use Pc-Check utility for testing hard disks and SAS HBA.

If there are no reasons reported for the checksum errors with sas2ircu or Pc-Check utility, the best further action then would be to make sure valid backup is available, purged IR volumes and create a software RAID for narrowing down the issue cause.

References

<NOTE:1513610.1> - MegaCli and sas2ircu - utility to manage Internal Raid HBA (LSI-Niwot /Erie)
<BUG:18606812> - LSI ERIE-INT, UNABLE TO DIAGNOSE CAUSER FOR ZFS/IO ERRORS WITH SAS2IRCU UTILITY.

Attachments

This solution has no attachment