Chapter 5: Concepts
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RAID 1
Recommended Applications for RAID 1
• Accounting
•Payroll
•Financial
• Any application requiring very high availability
RAID 5
Recommended Applications for RAID 5
• File and Application servers
• WWW, E-mail, and News servers
• Intranet servers
• Most versatile RAID level
RAID 10
Recommended Applications for RAID 10
Advantages Disadvantages
Simplest RAID storage subsystem
design
Can increase read performance by
processing data requests in parallel
since the same data resides on two
different drives
Very high disk overhead - uses only
50% of total capacity
Advantages Disadvantages
High Read data transaction rate
Medium Write data transaction rate
Good aggregate transfer rate
Disk failure has a medium impact on
throughput
Advantages Disadvantages
Implemented as a mirrored logical drive
whose segments are RAID 0 logical
drives
High I/O rates are achieved thanks to
multiple stripe segments
Very high disk overhead - uses only
50% of total capacity
