Disconnecting any SCSI cable in a dual-hosted StorEdge[TM] D1000 causes SCSI bus errors in remaining host due to loss of termination. (Doc ID 1002435.1)

Last updated on JULY 29, 2014

Applies to:

Sun Netra st D1000 Array - Version Not Applicable and later
Sun Storage D1000 Array - Version Not Applicable and later
All Platforms

Symptoms

Fatal SCSI bus errors occurred in one of two SunCluster[TM] hosts while the other host was down.

The following messages were observed:

(timestamp) test unix: WARNING: /sbus@49,0/QLGC,isp@0,10000/sd@9,0 (sd53):
(timestamp) test unix: SCSI transport failed: reason 'reset': retrying command
(timestamp) test unix: WARNING: /sbus@49,0/QLGC,isp@0,10000/sd@8,0 (sd52):
(timestamp) test unix: SCSI transport failed: reason 'reset': retrying command
(timestamp) test unix: WARNING: /sbus@49,0/QLGC,isp@0,10000/sd@0,0 (sd45):
(timestamp) test unix: SCSI transport failed: reason 'reset': retrying command
(timestamp) test unix: WARNING: /sbus@49,0/QLGC,isp@0,10000/sd@1,0 (sd46):
(timestamp) test unix: SCSI transport failed: reason 'reset': retrying command
(timestamp) test unix: WARNING: /sbus@49,0/QLGC,isp@0,10000 (isp3):
(timestamp) test unix: Received unexpected SCSI Reset
:
(timestamp) test unix: WARNING: /sbus@49,0/QLGC,isp@0,10000/sd@9,0 (sd53):
(timestamp) test unix: Error for Command: write(10) Error Level: Retryable
(timestamp) test unix: Requested Block: 37131864 Error Block: 37131864
(timestamp) test unix: Vendor: SEAGATE Serial Number: -x-x-x-x-x
(timestamp) test unix: Sense Key: Unit Attention
(timestamp) test unix: ASC: 0x29 (), ASCQ: 0x2, FRU: 0x2
(timestamp) test unix: WARNING: /sbus@49,0/QLGC,isp@0,10000/sd@0,0 (sd45):
(timestamp) test unix: Error for Command: read(10) Error Level: Retryable
(timestamp) test unix: Requested Block: 70729813 Error Block: 70729813
(timestamp) test unix: Vendor: SEAGATE Serial Number: -x-x-x-x-x
(timestamp) test unix: Sense Key: Unit Attention
(timestamp) test unix: ASC: 0x29 (), ASCQ: 0x2, FRU: 0x2
(timestamp) test unix: WARNING: /sbus@49,0/QLGC,isp@0,10000/sd@1,0 (sd46):
:
:
(timestamp) test unix: WARNING: /sbus@49,0/QLGC,isp@0,10000 (isp3):
(timestamp) test unix: Target 8 disabled wide SCSI mode
(timestamp) test unix: WARNING: /sbus@49,0/QLGC,isp@0,10000 (isp3):
(timestamp) test unix: Target 0 reducing transfer rate
(timestamp) test unix: WARNING: /sbus@49,0/QLGC,isp@0,10000 (isp3):
(timestamp) test unix: Target 1 reducing transfer rate
(timestamp) test unix: WARNING: /sbus@49,0/QLGC,isp@0,10000 (isp3):
(timestamp) test unix: Target 9 reducing transfer rate
:
:
(timestamp) test unix: WARNING: /sbus@49,0/QLGC,isp@0,10000/sd@1,0 (sd46):
(timestamp) test unix: Error for Command: write Error Level: Fatal
(timestamp) test unix: Requested Block: 18 Error Block: 19
(timestamp) test unix: Vendor: SEAGATE Serial Number: -x-x-x-x-x
(timestamp) test unix: Sense Key: Hardware Error
(timestamp) test unix: ASC: 0x44 (internal target failure), ASCQ: 0x0, FRU: 0xbe
:
:
(timestamp) test vxvm:vxconfigd: Offlining config copy 1 on disk c1t0d0s2:
(timestamp) test vxvm:vxconfigd: Reason: Disk write failure
:
:
(timestamp) test vxvm:vxconfigd: Detached plex data1-01 in volume data1
(timestamp) test vxvm:vxconfigd: Detached plex data4-01 in volume data4

If data redundancy was not properly configured, the above event could potentially result in data lost and/or service down time.

Changes

In the customer's situation, during the maintenance of one of 2 clustered hosts, customer/service personnel unwittingly disconnected a host SCSI cable from the D1000's host port (either the far right or far left port). The remaining host that is still connected to the D1000 started experiencing recurring and varied SCSI bus errors, that eventually turned fatal. As this host's application were live, i/o were active, and disks were managed by VxVM, the fatal bus errors caused active plexes to be detached.

Cause

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