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How to check our company storage LUN’s optimal path of the multipath configuration in the AIX5.3

Publication Date:  2012-12-04 Views:  40 Downloads:  0
Issue Description
There is an IBM midrange computer in site, the operating system is AIX5.3, and it connects with the S2600 storage, there have mapped 3 LUN from the storage to the host, how to check the LUN’s optimal path in the host?

Alarm Information
None
Handling Process
1. Take the “hdisk3” as an example, firstly, view the link information of the LUN via the following command, from the outcome of the command, we find there are 2 links totally.
# lspath -l hdisk3 -F "connection:parent:path_id"
200400a0b8504f77,1000000000000:fscsi0:0
200500a0b8504f77,1000000000000:fscsi1:1

2. View the priority of the two links through the following command, and we find the “priority” of the “fscsi1” link is higher than the “fscsi0” link:
# lspath -El hdisk3 -p fscsi0 -w "200400a0b8504f77,1000000000000"
scsi_id   0x10800            N/A          False
node_name 0x200400a0b8504f76 FC Node Name False
priority  4                  Connection   True
# lspath -El hdisk3 -p fscsi1 -w "200500a0b8504f77,1000000000000"
scsi_id   0x10800            N/A          False
node_name 0x200400a0b8504f76 FC Node Name False
priority  1                  Connection   True
Root Cause
None
Suggestions
None

END