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ASC: 0x29 (i_t nexus loss occurred) errors being logged against EMC storage devices (Doc ID 1491725.1)

Last updated on NOVEMBER 27, 2018

Applies to:

3rd-Party Hardware - Version Not Applicable to Not Applicable [Release N/A]
Sun Fire E6900 Server
Information in this document applies to any platform.

Symptoms

 The following errors are being logged on one or more FC hba paths going to EMC storage:

Aug 23 04:25:03 topas-db08 scsi: [ID 107833 kern.warning] WARNING: /pci@11,700000/SUNW,emlxs@0,1/fp@0,0/ssd@w50000972083271a4,d2 (ssd401):
Aug 23 04:25:03 topas-db08      Error for Command: read(10)                Error Level: Retryable
Aug 23 04:25:03 topas-db08 scsi: [ID 107833 kern.notice]        Requested Block: 64432560                  Error Block: 64432560
Aug 23 04:25:03 topas-db08 scsi: [ID 107833 kern.notice]        Vendor: EMC                                Serial Number: 28!rV000@
Aug 23 04:25:03 topas-db08 scsi: [ID 107833 kern.notice]        Sense Key: Unit Attention
Aug 23 04:25:03 topas-db08 scsi: [ID 107833 kern.notice]        ASC: 0x29 (i_t nexus loss occurred), ASCQ: 0x7, FRU: 0x0
Aug 23 05:50:41 topas-db08 scsi: [ID 107833 kern.warning] WARNING: /pci@11,700000/SUNW,emlxs@0,1/fp@0,0/ssd@w50000972083271a4,bd (ssd422):
Aug 23 05:50:41 topas-db08      Error for Command: write(10)               Error Level: Retryable
Aug 23 05:50:41 topas-db08 scsi: [ID 107833 kern.notice]        Requested Block: 62902464                  Error Block: 62902464
Aug 23 05:50:41 topas-db08 scsi: [ID 107833 kern.notice]        Vendor: EMC                                Serial Number: 28!r;000@
Aug 23 05:50:41 topas-db08 scsi: [ID 107833 kern.notice]        Sense Key: Unit Attention
Aug 23 05:50:41 topas-db08 scsi: [ID 107833 kern.notice]        ASC: 0x29 (i_t nexus loss occurred), ASCQ: 0x7, FRU: 0x0
Aug 23 05:54:29 topas-db08 scsi: [ID 107833 kern.warning] WARNING: /pci@11,700000/SUNW,emlxs@0,1/fp@0,0/ssd@w50000972083271a4,f (ssd596):
Aug 23 05:54:29 topas-db08      Error for Command: write(10)               Error Level: Retryable
Aug 23 05:54:29 topas-db08 scsi: [ID 107833 kern.notice]        Requested Block: 8328449                   Error Block: 8328449
Aug 23 05:54:29 topas-db08 scsi: [ID 107833 kern.notice]        Vendor: EMC                                Serial Number: 28!l!000@
Aug 23 05:54:29 topas-db08 scsi: [ID 107833 kern.notice]        Sense Key: Unit Attention
Aug 23 05:54:29 topas-db08 scsi: [ID 107833 kern.notice]        ASC: 0x29 (i_t nexus loss occurred), ASCQ: 0x7, FRU: 0x0
Aug 23 07:15:51 topas-db08 scsi: [ID 107833 kern.warning] WARNING: /pci@11,700000/SUNW,emlxs@0,1/fp@0,0/ssd@w50000972083271a4,10 (ssd595):
Aug 23 07:15:51 topas-db08      Error for Command: write(10)               Error Level: Retryable
Aug 23 07:15:51 topas-db08 scsi: [ID 107833 kern.notice]        Requested Block: 13812976                  Error Block: 13812976
Aug 23 07:15:51 topas-db08 scsi: [ID 107833 kern.notice]        Vendor: EMC                                Serial Number: 28!l"000@
Aug 23 07:15:51 topas-db08 scsi: [ID 107833 kern.notice]        Sense Key: Unit Attention
Aug 23 07:15:51 topas-db08 scsi: [ID 107833 kern.notice]        ASC: 0x29 (i_t nexus loss occurred), ASCQ: 0x7, FRU: 0x0
Aug 23 18:03:36 topas-db08 emlxs: [ID 349649 kern.info] [ 5.0314]emlxs3: NOTICE: 710: Link down.
Aug 23 18:04:23 topas-db08 emlxs: [ID 349649 kern.info] [ 5.0536]emlxs3: NOTICE: 720: Link up. (4Gb, fabric, initiator)
Aug 23 18:04:26 topas-db08 scsi: [ID 107833 kern.warning] WARNING: /pci@11,700000/SUNW,emlxs@0,1/fp@0,0/ssd@w50000972083271a4,c7 (ssd412):
Aug 23 18:04:26 topas-db08      Error for Command: read(10)                Error Level: Retryable

 

Cause

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In this Document
Symptoms
Cause
Solution
  Have the customer contact EMC to verify that the correct bits are set on the EMC front end adapters to allow proper connectivity with a solaris server.


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