HP StorageWorks HSG80 ACS Solution Software V8.8 for HP-UX Installation and Configuration Guide (AA-RV1FA-TE, March 2005)

Planning Storage Configurations
66 HSG80 ACS Solution Software V8.8 for HP-UX Installation and Configuration Guide
Determining Storage Requirements
It is important to determine your storage requirements. Here are a few of the
questions you should ask yourself regarding the subsystem usage:
■ What applications or user groups access the subsystem? How much capacity
do they need?
■ What are the I/O requirements? If an application is data transfer-intensive,
what is the required transfer rate? If it is I/O request-intensive, what is the
required response time? What is the read/write ratio for a typical request?
■ Are most I/O requests directed to a small percentage of the disk drives? Do
you want to keep it that way or balance the I/O load?
■ Do you store mission-critical data? Is availability the highest priority or
would standard backup procedures suffice?