HP Hitachi Dynamic Link Manager Software - Manual (Page 363)

The paths existing when the HBAs were replaced remain in Offline(E)
status.
2
.
Execute the dlmcfgmgr utility (dlmcfgmgr -v) to check the HDLM device
status.
Because the paths existing when HBAs were replaced are in Offline(E)
status, a hyphen (-) is displayed for Device.
3
.
Execute the dlmcfgmgr utility (dlmcfgmgr -u) to delete the old
information about paths and SCSI devices.
In the -u parameter, specify an HDevName device for which a hyphen (-)
is displayed for Device in step 2. Note that you need to execute the utility
for each HDevName device for which a hyphen (-) is displayed for Device.
The following shows an example of the command you execute if the
HDevName value is /dev/sddlmaa:
# dlmcfgmgr -u /dev/sddlmaa
4
.
Execute the dlmcfgmgr utility (dlmcfgmgr -v) to confirm that all the lines
on which a hyphen (-) was displayed for Device have been deleted.
# dlmcfgmgr -v
5
.
Execute the view operation of the dlnkmgr command (dlnkmgr view -
path -hbaportwwn) to confirm that all the information about the paths
that were placed in Offline(E) status has been deleted.
# /opt/DynamicLinkManager/bin/dlnkmgr view -path -hbaportwwn
Replacing a Fiber Cable
If there are multiple online paths for a device in an LU, you can replace a
desired fiber cable while running your applications by placing offline only the
path that goes through the fiber cable to be replaced, and using other paths
to continue accesses.
The following steps show an example procedure for replacing a fiber cable.
Note that this procedure only applies to replacing a fiber cable.
This example assumes the system configuration shown below:
HDLM Operation
4-31
Hitachi Dynamic Link Manager User Guide for Linux ®