Promise Technology UltraTrak100 TX4 User Manual page 17

Recommended Applications for RAID 1
Accounting
Payroll
Financial
Any application requiring very high availability
RAID 3
Advantages
High Read data transfer rate
Disk failure has an insignificant impact on
throughput
Recommended Applications for RAID 3
Image Editing
Prepress Applications
Any application requiring high throughput
RAID 5
Characteristics/Advantages
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
Intranet servers
Most versatile RAID level
RAID 0+1
Characteristics/Advantages
Implemented as a mirrored array whose
segments are RAID 0 arrays
High I/O rates are achieved thanks to
multiple stripe segments
Recommended Applications for RAID 0+1
Imaging applications
Database servers
General fileserver
Disadvantages
Parity drive can become bottleneck if a lot
of writes are occurring
Disadvantages
Disk failure has a medium impact on
throughput
Disadvantages
High disk overhead - uses only 50% of
total capacity
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