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ADAC Ultra2 S466 Hardware Guide
50
Planning the Array Configuration
Answer the following questions about this array:
Question Answer
Number of physical disk drives in the array
Purpose of this array. Rank the following factors:
Maximize drive capacity
Maximize the safety of the data (fault tolerance)
Maximize hard drive performance and throughput
How many hot spares?
Amount of cache memory installed on ADAC Ultra2 S466
Are all of the disk drives and the server protected by a UPS?
Using the Array Configuration Planner The following table lists the
possible RAID levels, fault tolerance, and effective
capacity for all possible drive configurations for an array
consisting of one to eight drives. This table does not take
into account any hot spare (standby) drives. You should
always have a hot spare drive in case of drive failure.
RAID 1 and RAID 10 require 2, 4, 6, or 8 drives. RAID 30
and RAID 50 require at least 6 drives.