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1 format, 2 parameters – HP Hitachi Dynamic Link Manager Software User Manual

Page 352

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7. Utility Reference

330

7.9 dlmpr Utility for Clearing HDLM Persistent Reservation

The persistent reservation of a logical unit (LU) may not be canceled due to some

reason when multiple hosts share a volume group rather than making up a cluster

configuration. In this case, this utility clears the Reservation Key to cancel the

persistent reservation.

7.9.1 Format

/usr/DynamicLinkManager/bin/dlmpr {{-k | -c} [

hdisk-name

]

[

hdisk-name

] ... [-a] | -h}

7.9.2 Parameters

-k

Specify this parameter to display the Reservation Key. The following explains the

items displayed when the

-k

parameter is specified:

Reservation Key

An asterisk (

*

) is displayed at the end of the Reservation Key for a

Reservation Key of another host.
If the Reservation Key is not set,

[0x0000000000000000]

is displayed.

Regist Key

The registered Keys are displayed.

Key Count

The number of registered Keys is displayed.

-c

Specify this parameter to clear the Reservation Key.
Note

Do not use the

-c

parameter during normal operation. Once the

Reservation Key is cleared, the hdisk can be accessed from other hosts,

which may lead to data corruption.
Use the

-c

parameter only when you need to clear a Reservation Key

that was improperly retained.

When the hdisk-name parameter is omitted, the Reservation Key for the

hdisks that makes up rootvg will not be cleared. In this case, the

KAPL10670-I message is displayed in the execution result.

hdisk-name