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Chapter 5 Configuring ADAC Ultra2 S466
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Optimizing Data Storage
Data Access Requirements Each type of data stored in the disk subsystem
has a different frequency of read and write activity. If you
know the data access requirements, you can more
successfully determine a strategy for optimizing the disk
subsystem capacity, availability, and performance.
Servers that support Video on Demand typically read the
data often, but write data infrequently. Both the read and
write operations tend to be long. Data stored on a general-
purpose file server involves relatively short read and write
operations with relatively small files.
Array Functions You must first define the major purpose of the disk array.
Will this disk array increase the system storage capacity for
general-purpose file and print servers? Does this disk array
support any software system that must be available 24
hours per day? Will the information stored in this disk
array contains large audio or video files that must be
available on demand? Will this disk array contain data
from an imaging system?
You must identify the purpose of the data to be stored in
the disk subsystem before you can confidently choose a
RAID level and a RAID configuration.