Chapter 6: Technology
117
RAID 5
Recommended Applications for RAID 5:
RAID 10
Recommended Applications for RAID 10:
• Imaging applications
• Database servers
• General fileserver
JBOD
Recommended Applications for JBOD:
• Any application requiring multiple physical drives but where read/write speed
or fault-tolerance are not important
• Applications were low-cost operation critical
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
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
Advantages Disadvantages
Enables you to manage a large number
of physical drives from a single
controller
The failure of one drive has no effect
upon the data in other physical drives
An alternative to RAID without any
RAID advantages
Should not be used in mission critical
environments
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