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Chapter 7: Technology Background
189
RAID 1E
Recommended Applications for RAID 1E:
• Imaging applications
• Database servers
• General fileserver
RAID 5
Recommended Applications for RAID 5:
RAID 6
Recommended Applications for RAID 6:
• Accounting/Financial
• Database servers
• Any application requiring very high availability
Advantages Disadvantages
Implemented as a mirrored disk array
whose segments are RAID 0 disk
arrays
High I/O rates are achieved thanks to
multiple stripe segments
Can use an odd number of disks
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
• File and Application servers
• WWW, E-mail, and News servers
• Intranet servers
• Most versatile RAID level
Advantages Disadvantages
High Read data transaction rate
Medium Write data transaction rate
Good aggregate transfer rate
Safest RAID level
High disk overhead – equivalent of two
drives used for parity
Slightly lower performance than RAID 5