Promise Technology EX8650 Manual De Usuario
Chapter 6: Technology Background
169
RAID 1E
Recommended Applications for RAID 1E
•
•
Imaging applications
•
Database servers
•
General fileserver
RAID 5
Recommended applications for RAID 5:
•
•
File and Application servers
•
WWW, E-mail, and News servers
•
Intranet servers
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
Can use an odd number of physical
drives
drive whose segments are RAID 0
logical drives
High I/O rates are achieved thanks to
multiple stripe segments
Can use an odd number of physical
drives
Very high physical drive overhead –
uses only 50% of total capacity
uses only 50% of total capacity
Advantages
Disadvantages
High Read data transaction rate
Medium Write data transaction rate
Good aggregate transfer rate
Most versatile RAID level
Medium Write data transaction rate
Good aggregate transfer rate
Most versatile RAID level
Physical drive failure has a medium
impact on throughput
impact on throughput