Promise Technology M310p User Manual
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
whose segments are RAID 0 disk
arrays
High I/O rates are achieved thanks to
multiple stripe segments
multiple stripe segments
Can use an odd number of disks
Very high disk overhead - uses only
50% of total capacity
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
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
drives used for parity
Slightly lower performance than RAID 5