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

4. HDLM Operation
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hdisk10 blv=hd5
hdisk0 blv=hd5
hdisk1 blv=hd5
...
4.5.5 Replacing a Fiber Cable
If there are multiple active paths for an LU, you can replace a desired cable while
running your applications by placing offline only the path that goes through the cable
to be replaced and using other paths to continue access.
Note
The following procedure is only for replacing a fiber cable.
To replace a fiber cable:
1. Execute the
dlmodmset utility for setting the HDLM execution environment
ODM to check the NPIV option setting.
# /usr/DynamicLinkManager/bin/dlmodmset -o
The following are execution examples:
Lun Reset : off
Online(E) IO Block : on
NPIV Option : off
Check the NPIV Option line.
2. Place in Offline (C) status the path that goes through the cable to be replaced (path
that goes through the HBA to which the cable is connected).
Depending on the NPIV option setting for the
dlmodmset utility checked in step
1, execute one of the following commands:
• If the NPIV option is set to
off:
Specify the HBA adapter number and bus number, and then execute the
command shown below. The following example shows how to place the path
in Offline (C) status when the path goes through an HBA whose HBA
adapter number is
08 and whose bus number is 11:
# /usr/DynamicLinkManager/bin/dlnkmgr offline -hba 08.11