installation and reference guide HP MPIO Full Featured DSM for MSA1000/1500 (Active-Active) Disk Arrays 3.02.00 (AA-RW8AF-TE, March 2009)

CAUTION:
Using this utility incorrectly may result in loss of data and/or incorrect operation of MSCS/Failover
Cluster. HP shall not be liable for problems resulting from the incorrect use of this utility or for solving
them.
The persistent reservations clear utility is located on the HP MPIO MSA DSM installation media, and
gets copied to the HP MPIO MSA DSM installation directory during the installation. You can run this
utility either on a system that has HP MPIO MSA DSM installed or on a system where HP HP MPIO
MSA DSM is not installed.
To run this utility on a system where the HP MPIO MSA DSM is installed, complete the following steps:
1. Select Start > Programs > Hewlett-Packard > MSA DSM > HPDSM PR Utility.
2. Enter the command hpprutil /? at the command prompt to display the instructions for using
this utility.
The hpprutil utility supports the following commands:
• hpprutil devices
• hpprutil clear device
• hpprutil help
hpprutil devices
Syntax: hpprutil devices
The hpprutil devices command displays details of reservations on the devices as shown in the
following example. If there are no devices present, the following message is displayed: No Devices
Found.
Example:
hpprutil devices
NT Disk#ReservationSCSI AddressDevice NameDevice#
Disk 1SCSI3.0.0.12HP MSA_VOLUME1
Disk 2SCSI3.0.0.13HP MSA_VOLUME2
Disk 3SCSI3.0.0.14HP MSA_VOLUME3
hpprutil clear device
Syntax: hpprutil clear device=x
Syntax: hpprutil clear device=m n
The hpprutil clear device command clears the reservation present on device x, or clears the
reservation present on devices starting from m to n (both inclusive), depending on the input parameter
specified.
Example:
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