HP StorageWorks HSG80 ACS Solution Software V8.8 for OpenVMS Installation and Configuration Guide (AA-RV1PA-TE, March 2005)

Planning Storage Configurations
64 HSG80 ACS Solution Software V8.8 for OpenVMS Installation and Configuration Guide
Initialize Switches:
Unit Switches:
Planning Considerations for Storageset
This section contains the guidelines for choosing the storageset type needed for
your subsystem:
■ Stripeset Planning Considerations, page 64
■ Mirrorset Planning Considerations, page 68
■ RAIDset Planning Considerations, page 69
■ Striped Mirrorset Planning Considerations, page 71
■ Storageset Expansion Considerations, page 73
■ Partition Planning Considerations, page 73
Stripeset Planning Considerations
Stripesets (RAID 0) enhance I/O performance by spreading the data across
multiple disk drives. Each I/O request is broken into small segments called
“chunks.” These chunks are then simultaneously “striped” across the disk drives
in the storageset, thereby enabling several disk drives to participate in one I/O
request.
Chunk size Save Configuration Metadata
_X_ Automatic (default)
___ 64 blocks
___ 128 blocks
___ 256 blocks
___No (default)
_X
_Yes
_X
_Destroy (default)
___Retain
Caching Access by following hosts enabled
Read caching_______X__
Read-ahead caching_____
Write-back caching___X
__
Write-through caching____
_ALL
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