HP XP Racks - Manual (Page 481)

Migrating Reservation Control Settings
In HDLM version 5.8.1 or earlier, the reservation control setting is called the
reservation level and is specified by using the set operation with the -rsv on
parameter. The target of the reservation level was every LU in an HDLM
management-target device. However, you can set the reservation policy
specification on each LU if the AIX version is AIX 5L V5.2 or later. The
reservation control setting is specified by using the chdev command in HDLM
version 5.9 or later. Therefore, the -rsv on parameter for the set operation
is no longer provided. The following table lists the correspondence of the
setting values between the reservation level and the reservation policy.
Table B-2 The correspondence of the setting values between the
reservation level and reservation policy
Reservation Level Reservation Policy
0: Ignoring the reservation no_reserve
2: Persistent reservation PR_exclusive
Support for a Boot Disk Environment
A storage system disk can now be used for the boot disk. Accompanying this,
the dlmpreremove utility that is executed before removing HDLM has been
provided. The dlmpreremove utility excludes, before you remove HDLM, the
hdisk recognized as a boot disk from being an HDLM management-target
device.
About Settings when Upgrading the OS
Eliminating Settings when Upgrading the OS
There is no required procedure in HDLM when the OS is upgraded.
Eliminating Settings when Changing the Kernel Mode
In HDLM version 5.9 or later, both 32-bit and 64-bit versions are installed.
When the 32-bit kernel is in use, the 32-bit version of HDLM is used
automatically, and when the 64-bit kernel is in use, the 64-bit HDLM is used
automatically.
Because of the changes explained in Eliminating Settings when Upgrading the
OS on page B-5 and Eliminating Settings when Changing the Kernel Mode on
page B-5 , the dlmchenv utility for modifying the HDLM execution environment
is no longer necessary and has been deleted.
Differences Between HDLM Version 5.9 or Later and Version 5.8.1 or Earlier
B-5
Hitachi Dynamic Link Manager (for AIX) User Guide