Promise Technology EX8650A, EX4650A user manual High Read data transaction rate

		Chapter 6: Technology Background
RAID 50
	Advantages	Disadvantages
	High Read data transaction rate	Physical drive failure has a moderate
	Good write data transaction rate	impact on throughput
	Very good aggregate transfer rate
	Most versatile RAID level

Recommended applications for RAID 50:

•File and Application Servers

•Transaction Processing

•Office applications with many users accessing small files

RAID 60

Advantages	Disadvantages
High Read data transaction rate	High disk overhead – equivalent of two
Medium Write data transaction rate	drives used for parity
	Slightly lower performance than RAID
Good aggregate transfer rate
	50
Safest RAID level

Recommended Applications for RAID 60:

•Accounting and Financial

•Database servers

•Any application requiring very high availability

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