Managing Luns (Logical Drives); Checking Lun Configuration; Creating A Lun - HP Surestore Disk Array 12h - And FC60 System Administrator Manual

Using the ARM Command Line Utilities for MPE

Managing LUNs (Logical Drives)

Managing LUNs (Logical Drives)
An important part of managing the disk array involves defining and maintaining the optimal LUN structure
for your system. Your system requirements and limitations will influence the LUN structure you choose.
Managing LUNs is a part of the overall task of managing disk array capacity. For more information on
managing disk array capacity to meet your system needs, refer to the HP SureStore E Disk Array 12H
User's and Service Manual.

Checking LUN Configuration

When you are managing LUNs, you may find it convenient to check the current LUN configuration and the
available capacity.
To check the current LUN configuration and the available capacity, type:
arraydsp -l [LUN] <array-id>

Creating a LUN

Only capacity assigned to LUNs is visible to the operating system. When selecting the size for your LUNs,
consider the following factors:
Any size limitations imposed by the operating system.
Your backup strategy. If you do unattended backup to a device such as a tape, you may want to avoid
creating a LUN that is larger than the capacity of the tape media. This allows you to back up an entire
LUN without changing tapes.
Configuring the LUN for maximum performance as described in
NOTE! Before creating a LUN, check your operating system documentation for any additional
information or steps that may be required to create a LUN.
To create a LUN, type:
arraycfg -L LUN -a capacity <array-id>
LUN must be an unused value between 0 and 7
Capacity must be less than or equal to the currently available unallocated capacity
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Table 15.