Compaq StorageWorks HSG60 ACS Solution V8.6 for SGI IRIX Installation and Configuration Guide

Planning Storage 2–19

Plan the mirrorset members, then plan the stripeset that will contain them. Review the

recommendations in “Storageset Planning Considerations,” page 2–10, and “Mirrorset

Planning Considerations,” page 2–13.

Storageset Expansion Considerations

Storageset Expansion allows for the joining of two of the same kind of storage

containers by concatenating RAIDsets, Stripesets, or individual disks, thereby forming

a larger virtual disk which is presented as a single unit. The Compaq StorageWorks

HSG60 Array Controller (ACS) Version 8.6 CLI Reference Guide describes the CLI

command: ADD CONCATSETS which is used to perform concatenation.

CAUTION: The ADD CONCATSETS command should only be executed with

host operating systems that support dynamic volume expansion. If the operating

system cannot handle one of its disks increasing in size, use of this command could

make data inaccessible.

Partition Planning Considerations

Use partitions to divide a container (storageset or individual disk drive) into smaller

pieces, each of which can be presented to the host as its own storage unit. Figure 2–14

shows the conceptual effects of partitioning a single-disk container.

Figure 2–14. One example of a partitioned single-disk unit

1 Partition 1

2 Partition 2

3 Partition 3

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