HP StorageWorks XP48 Disk Array - Manual (Page 75)

Working With OS-Based Constraints 75
4-6-4-12 Notes on Changing the Software Configuration
For a host for which a host-setting operation has not finished (that is, for a host for which a suspended
operation exists in the operation log), do not change any of the software listed below by installing or uninstalling
them, or by changing the software version.
• OS
• File system
• Program prerequisite for Provisioning Manager
• Program related to Provisioning Manager
For specific software names, see system requirements, prerequisite programs and related programs described
in the manual HP StorageWorks XP Provisioning Manager Installation and Configuration Guide.
If you change any of the above software for a host for which a host-setting operation has not finished, that host-
setting operation cannot be guaranteed when it resumes from the operation log. Before you change any
software, see the operation log and make sure that all host-setting operations have finished.
4-6-4-13 Notes on Changing a Host Name
When you change the host name of a host machine, match the host name of the host machine with the host
management information of Device Manager, and then use Provisioning Manager.
If you update host information when the host name of the host machine and host management information of
Device Manager do not match, both the host name that existed from before the change and the one created
after the change are displayed in the host management window. In such a case, you might be unable to use
Provisioning Manager correctly.
4-6-5 Improving HP-UX Host Performance
Provisioning Manager functionality can be used to ensure more flexible operations within existing systems.
4-6-5-1 Notes on the Parameters of Command Utilities
To unify interfaces for creating a file system or a device file, Provisioning Manager changes the following
command utility parameters from the default settings. When manually changing a value, follow the input format
appropriate for each OS. For performance-related settings, Provisioning Manager uses the HP-UX default
settings except for those described below. When you want to improve host performance, manually adjust the
settings.
The size of a physical partition is specified so that the maximum size of a physical volume that Logical Volume
Manager can recognize is 1 TB.
Supplementary note: To specify the setting manually, use the -s option of the vgcreate command.
Setting value: 256 MB
Default value: 4 MB
The maximum number of physical partitions for a physical volume is specified so that the maximum size of a
physical volume that Logical Volume Manager can recognize is 1 TB.
Supplementary note: To manually specify the setting, use the -e option of the vgcreate command.
Setting value: 4,096
Default value: 1,016 #
# When you execute the vgcreate command to create a volume group and specify a physical volume
larger than 1016 times the physical partition size, the default value is adjusted according to the size of
that physical volume.
The maximum number of physical volumes is specified for a volume group according to the maximum value
that can be specified using Provisioning Manager.
Supplementary note: To manually specify the setting, use the –p option of the vgcreate command.
Once a volume group is created, the maximum number of physical volumes for a volume group cannot be
changed. When specifying the setting, keep in mind the overall system operation.
Setting value: 32
Default value: 16
The setting is specified so that the file system is checked at startup to make sure that the file system will not
have problems after the system terminated abnormally
# .