Promise Technology Network Device EX8654 - Manual (Page 247)

Chapter 7: Technology Background
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RAID 1E
Recommended Applications for RAID 1E
•
Imaging applications
• Database servers
• General fileserver
RAID 5
Recommended applications for RAID 5:
•
File and Application servers
• WWW, E-mail, and News servers
• Intranet servers
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
Can use an odd number of physical
drives Very high physical drive overhead –
uses only 50% of total capacity
Advantages Disadvantages
High Read data transaction rate
Medium Write data transaction rate
Good aggregate transfer rate
Most versatile RAID level Physical drive failure has a medium
impact on throughput