Error Message

- dmp_fast_recovery is set to off

# vxdmpadm gettune dmp_fast_recovery
            Tunable               Current Value  Default Value
------------------------------    -------------  -------------
dmp_fast_recovery                       off               on

- System messages shows reservation conflict messages

kernel: VxVM vxdmp V-5-0-0 SCSI error opcode=0x5f returned rq_status=0x12 cdb_status=0x1 key=0x6 asc=0x2a ascq=0x3 on path 8/0x90
kernel: sd 2:0:0:1: reservation conflict
kernel: sd 2:0:0:1: Unhandled error code
kernel: sd 2:0:0:1: SCSI error: return code = 0x00110018
kernel: Result: hostbyte=invalid driverbyte=DRIVER_OK,SUGGEST_OK

- dmpevents.log shows I/O error for other paths

I/O error occurred on Path sdg belonging to Dmpnode emc0_03f8
I/O analysis done as DMP_PATH_OKAY on Path sdg belonging to Dmpnode emc0_03f8
Marked as ioerr Path sdg belonging to Dmpnode emc0_03f8
I/O error occurred on Path sdg belonging to Dmpnode emc0_03f8
Unmarked as ioerr Path sdg belonging to Dmpnode emc0_03f8

- vxfenadm shows only 1 key is registered confirming missing keys for remaining paths.

# vxfenadm -s /dev/vx/dmp/emc0_03f8
Reading SCSI Registration Keys...
Device Name: /dev/vx/dmp/emc0_03f8
Total Number Of Keys: 1
key[0]:
 [Numeric Format]: 66,86,67,83,0,0,0,0
 [Character Format]: BVCS
 [Node Format]: Cluster ID: unknown Node ID: 1 Node Name: testsys1

This is a known incident 2928764

When dmp_fast_recovery is off, the reservation flag is not set properly, due to which for the remaining paths the registration command fails with the transport error and PGR keys doesn't get registered. This results in subsequent reservation conflict messages.

But when dmp_fast_recovery is on the reservation flag is set correctly and hence this issue is not seen.

This issue has been fixed for

5.1SP1 :    From 5.1SP1RP3P1 onwards

6.0.1:    From 6.0.3 onwards

These patches can be obtained from SORT  https://sort.Veritas.com/patch/finder

Applies To

SFHA 5.1SP1 and 6.0.1 on RHEL 5/6 or SLES 10/11