Avago Technologies MegaRAID SATA 150-4 (523) - Manual (Page 47)

RAID Configuration Planning 2-25
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2.8.2 Array Purpose
Important factors to consider when creating RAID arrays include
availability, performance, and capacity. Define the major purpose of the
disk array by answering questions related to these factors, such as the
following, which are followed by suggested RAID levels for each situation:
•
Does this disk array increase the system storage capacity for
general-purpose file and print servers? Use RAID 5, 10, or 50.
•
Does this disk array support any software system that must be
available 24 hours per day? Use RAID 1, 5, 10, or 50.
•
Does the information stored in this disk array contain large audio or
video files that must be available on demand? Use RAID 0.
•
Does this disk array contain data from an imaging system? Use
RAID 0 or 10.
Fill out Table 2.14 to help you plan the array configuration. Rank the
requirements for your array, such as storage space and data redundancy,
in order of importance, then review the suggested RAID levels.
Table 2.14 Factors to Consider for Array Configuration
Requirement Rank Suggested RAID Level(s)
Storage space RAID 0, RAID 5
Data redundancy RAID 5, RAID 10, RAID 50
Hard drive performance and throughput RAID 0, RAID 10
Hot spares (extra hard drives required) RAID 1, RAID 5, RAID 10, RAID 50