HP StorageWorks HSG80 ACS Solution Software V8.8 for Windows NT, Windows 2000, and Windows Server 2003 (32-bit) Installation and Configuration Guide (AA-RV1XA-TE, March 2005)

Planning Storage Configurations
91HSG80 ACS Solution Software V8.8 for Windows NT, Windows 2000, and Windows Server
2003 (32-bit) Installation and Configuration Guide
Partition Switches
The following switches are available when creating a partition:
■ Size
■ Geometry
For details on the use of these switches, refer to
CREATE_PARTITION command in the
HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller
Software Command Line Interface (CLI) Reference Guide.
Specifying Initialization Switches
Initialization switches set characteristics for established storagesets before they
are made into units. The following kinds of switches effect the format of a disk
drive or storageset:
■ Chunk Size (for stripesets and RAIDsets only)
■ Save Configuration
■ Destroy/Nodestroy
■ Geometry
Each of these switches is described in the following sections.
Note: After initializing the storageset or disk drive, you cannot change these switches
without reinitializing the storageset or disk drive.
Chunk Size
With ACS software, a parameter for chunk size (chunksize=default or n) on some
storagesets can be set. However, unit performance may be negatively impacted if a
non-default value is selected as the chunksize.
If a non-default chunk size has been calculated, verify that the chunk size value is
divisible by 8, with no remainder. If the value is not aligned with this rule, adjust
the chunk size value upward until it divisible by 8, with no remainder.
Specify the chunk size of the data to be stored to control the stripesize used in
RAIDsets and stripesets: