Raid 5; Raid 10; Jbod - Promise Technology FastTrak TX4650 User Manual

RAID 5

High Read data transaction rate
Medium Write data transaction rate
Good aggregate transfer rate
Recommended Applications for RAID 5:
• File and Application servers
• WWW, E-mail, and News servers

RAID 10

Implemented as a mirrored logical drive
whose segments are RAID 0 logical
drives
High I/O rates are achieved thanks to
multiple stripe segments
Recommended Applications for RAID 10:
• Imaging applications
• Database servers
• General fileserver

JBOD

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
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
Advantages
Advantages
Disadvantages
Disk failure has a medium impact on
throughput
• Intranet servers
• Most versatile RAID level
Disadvantages
Very high disk overhead - uses only
50% of total capacity
Disadvantages
An alternative to RAID without any
RAID advantages
Should not be used in mission critical
environments
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Chapter 6: Technology