Compaq StorageWorks HSG60 ACS Solution Software V8.6 for Compaq Tru64 UNIX Installation and Configuration Guide

Planning Storage 2–23
Partition Switches
You can specify the following switches when creating a partition:
■ Size
■ Geometry
For details on the use of these switches refer to
CREATE_PARTITION command in the
Compaq StorageWorks HSG60 Array Controller ACS Version 8.6 CLI Reference
Guide.
Initialization Switches
Initialization switches set characteristics for established storagesets before they are
made into units. The following kinds of switches affect the format of a disk drive or
storageset:
■ Chunk Size (for stripesets and RAIDsets only)
■ Save Configuration
■ Destroy/Nodestroy
■ Geometry
Each of these is described in the following sections.
NOTE: After you initialize the storageset or disk drive, you cannot change these switches
without reinitializing the storageset or disk drive.
Chunk Size
Specify the chunk size of the data to be stored to control the stripesize used in
RAIDsets and stripesets:
■ CHUNKSIZE=DEFAULT lets the controller set the chunk size based on the number
of disk drives (d) in a stripeset or RAIDset. If d ≤ 9 then chunk size = 256. If d > 9
then chunk size = 128.
■ CHUNKSIZE=n lets you specify a chunk size in blocks. The relationship between
chunk size and request size determines whether striping increases the request rate
or the data-transfer rate.