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6 replacing a fibre channel switch – HP Hitachi Dynamic Link Manager Software User Manual

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4. HDLM Operation

213

# /usr/DynamicLinkManager/bin/dlnkmgr view -path

For details about path information, see 6.7 view (Displays Information).

4.5.6 Replacing a Fibre Channel Switch

If there are multiple active paths for an LU, you can replace a desired Fibre Channel

switch while running your applications by placing offline only the path that goes

through the Fibre Channel switch to be replaced and by using other Fibre Channel

switches to continue access.
Note

The following procedure is only for replacing a Fibre Channel switch.

To replace a Fibre Channel switch:
1.

Execute the following command to find the

fscsi

number that corresponds to

the path that goes through the Fibre Channel switch that is to be replaced (the path

that goes through the HBA to which the Fibre Channel switch is connected):


# lsdev -C | grep fscsi

The following are execution examples:


fscsi0 available 1H-08-02 FC SCSI I/O controller protocol
device
fscsi1 available 11-08-02 FC SCSI I/O controller protocol
device

In the second line of the above examples,

11

in

11-08-02

indicates the bus

number and

08

indicates the HBA adapter number. If the Fibre Channel switch is

connected to this HBA, the corresponding

fscsi

number is

1

.

2.

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