Hitachi Dynamic Link Manager Software Users Guide for AIX (6.6) (T5208-96010, April 2011)

2. HDLM Functions

This sub-section explains these keys.

Path priority number

This number indicates the priority level set for each path. Priority levels can be

set from

1 to 255. The lower the number, the higher the priority. The default is 1.

The priority level is set by using OS commands. The following shows an example

of the procedure for setting the path priority number.

1. Execute a command that displays the path information for the LU:

# lspath -l hdisk4 -F"name parent path_id connection

path_status status"

hdisk4 fscsi0 0 50060e8005271720,31000000000000

Available Enabled

hdisk4 fscsi1 1 50060e8005271730,31000000000000

Available Enabled

hdisk4 fscsi2 2 50060e8005271740,31000000000000

Available Enabled

hdisk4 fscsi3 3 50060e8005271750,31000000000000

Available Enabled

2. Execute a command that displays the information for the path whose path

priority number you want to set:

# lspath -l hdisk4 -p fscsi0 -w

50060e8005271720,31000000000000 -E

scsi_id 0x651400 SCSI ID False

node_name 0x50060e8005271720 FC Node Name False

state Enabled N/A True

priority 1 N/A True

3. Execute a command that changes the path priority number:

# chpath -l hdisk4 -p fscsi0 -w

50060e8005271720,31000000000000 -a priority=5

path Changed

4. Execute a command that displays the information for the path for which a

new path priority number has been set:

# lspath -l hdisk4 -p fscsi0 -w

50060e8005271720,31000000000000 -E

scsi_id 0x651400 SCSI ID False