Hi; I'm running AIX 7.1 in a partition hosted in a p750 with dual vios.
Both VIOS present a SAN Lun to the partition.
This is the how the path to the disk is seen by the partition:
lspath -l hdisk0 -s available -F"connection:parent:path_status:status"
lspath -l hdisk0
Enabled hdisk0 vscsi0
Enabled hdisk0 vscsi2
lspath -El hdisk0 -p vscsi0 -a priority
priority 1 Priority True
lspath -El hdisk0 -p vscsi2 -a priority
priority 2 Priority True
If I remove the virtual target device at the VIOS which servers the lun trhough vscsi0 the path turns to Failed and the traffic moves to vscsi2, but, when I restore the virtual target devide and the path comes back to Enabled, the traffic does not comes back to vscsi0.
What should I do to make the traffic go back.
Regards and thanks in advance.
Pinned topic MPIO not returning to highest priority path.
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Updated on 2012-11-22T17:53:35Z at 2012-11-22T17:53:35Z by ppereira
Re: MPIO not returning to highest priority path.2012-11-21T12:14:00ZThis is the accepted answer. This is the accepted answer.
- SystemAdmin 110000D4XK
Re: MPIO not returning to highest priority path.2012-11-21T18:01:24ZThis is the accepted answer. This is the accepted answer.What is the value of the hcheck_interval on yours disks on the lpar
By default =0
The value préconize by IBM is 60
Read Redbook for précision
Re: MPIO not returning to highest priority path.2012-11-22T15:36:23ZThis is the accepted answer. This is the accepted answer.
- ppereira 0100002RH6
When the algorithm attribute value is failover, the paths are kept in a list. The sequence in this list determines which path is selected first and, if a path fails, which path is selected next. The sequence is determined by the value of the path priority attribute. A priority of 1 is the highest priority. Multiple paths can have the same priority value, but if all paths have the same value, selection is based on when each path was configured.
From above I don't expect an automatic failover to the preferred path. You didn't answer if manual intervention (the varyonvg) does the trick or not.
Re: MPIO not returning to highest priority path.2012-11-22T17:53:35ZThis is the accepted answer. This is the accepted answer.
- SystemAdmin 110000D4XK
I'm running 7100-01-03-1207. Right now I'm downloading the latest service pack and will try it.
Regards and thanks.