Defining msa array objects, Figure 58 defining msa array objects with the acu, Calculating msa lu size and defining lus – HP StorageWorks XP Remote Web Console Software User Manual
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External Storage XP user guide
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The MSA Disk Array does not require any special firmware level or hardware additive to be usable by
External Storage XP as long as the firmware level in use supports the appropriate host mode setting (for
example, Windows or Tru64).
NOTE:
Download the ACU and ACU Online User Guide from the following address:
Defining MSA array objects
Use the Array Configuration Utility (ACU) to define at least one internal MSA array object (for instance,
“A”) when first setting up the array. After defining an array object, specify LUs within that array object.
Figure 58
Defining MSA array objects with the ACU
Calculating MSA LU size and defining LUs
The ACU used for configuring the MSA uses an optimization algorithm to calculate the user size of a new
LU given a user-specified size in MB (
). Because you cannot bypass or disable the optimization
algorithm, you must compensate for this optimization so that MSA LUs are created at the correct size.
When requesting a new LU through the ACU, make the request 2 to 3 MB larger than needed for
presentation to the XP10000/XP12000. For example, suppose you want to create a 40 GB (40960 MB)
LU on the MSA for use as XP10000/XP12000 external storage. If you request only the exact size needed,
the ACU optimizes the LU to a size of 40959 MB, which is 1 MB smaller than needed. In this case, the