In UCS CLI after issuing command ‘show cluster state‘ a warning is received on one of the chassis.
UCS-B # show cluster state
Cluster Id: 0xf122a7f83dba11e0-0x9a4c123573c4f1c4
B: UP, PRIMARY
A: UP, SUBORDINATE
Detailed state of the device selected for HA storage:
Chassis 1, serial: FOX1234567A, state: active
Chassis 2, serial: FOX1234567B, state: active
Chassis 5, serial: FOX1234567C, state: active with errors
Fabric B, chassis-seeprom local IO failure:
FOX1234567C READ_FAILED, error: TIMEOUT, error code: 10, error count: 7
Warning: there are pending SEEPROM errors on one or more devices, failover may not complete
In sam_techsupportinfo log you’ll see the following message
Creation Time: 2012-10-12T01:12:21.217
Description: device FOX1234567C, error accessing shared-storage
Affected Object: sys/mgmt-entity-B
Cause: Device Shared Storage Io Error
This is known Cisco Bug CSCtu17144 and here is what needs to be done
If the fault condition stays on or keeps being cleared and re-raised, try the following workarounds:
1. Reboot the IO module.
2. Remove and re-seat the IO module. Make sure the module is in contact with the backplane firmly.
I’ve had this problem couple times and resetting IO module was enough in both cases