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