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3 setting the reservation policy – HP Hitachi Dynamic Link Manager Software User Manual

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3. Creating an HDLM Environment

158

3.10.3 Setting the Reservation Policy

When you use HACMP, we usually recommend that you set the

reserve_policy

attribute to

PR_exclusive

. However, when a virtual I/O function is applied in order

to use HACMP in a client partition, use the following procedure to check, in the virtual

I/O server partition, the settings for the

reserve_policy

attribute of the hdisk. If

reserve_policy

is set to

PR_exclusive

, change its value to

no_reserve

.

1.

Check the setting for the

reserve_policy

attribute of the hdisk.


# lsattr -El

hdisk-name

-a reserve_policy

reserve_policy PR_exclusive N/A TRUE

Perform the following steps if

reserve_policy

is set to

PR_exclusive

:

2.

Quit all applications that specify and directly access the hdisk whose attribute is

to be changed.

3.

Execute the following command to unmount the file system used by HDLM.


# umount

file-system-mount-point

4.

Execute the following command to display all the activated volume groups.


# lsvg -o

5.

Among the displayed volume groups, inactivate the volume groups used by

HDLM.


# varyoffvg

volume-group-name

6.

Execute the

chdev

command to change the

reserve_policy

attribute to

no_reserve

.

# chdev -l

hdisk-name

-a reserve_policy=no_reserve

7.

Confirm that the setting was changed to

no_reserve

.


# lsattr -El

hdisk-name

-a reserve_policy

reserve_policy no_reserve N/A TRUE