Dell PowerVault MD1120 User Manual
Page 31
A REFERENCE GUIDE FOR OPTIMIZING DELL™ POWERVAULT™ MD1XXX FAMILY SAS SOLUTION
VER A02
PAGE 31
6/16/2008
Not recommended:
• RAID 0, Concatenated – Not recommended due to lack of redundancy and data
protection.
Note: While these configurations are not recommended, they can be configured and
utilized.
Table 10: Email Sever Enclosure Guidelines
Application
Enclosure
MD1000
3U / 15 x 3.5” drive
MD1120
2U / 24 x 2.5” drive
Recommended
Not Recommended
Possible
Recommended:
• MD1000 – Recommended for e-mail servers where large mailbox capacity is priority.
• MD1120 – Recommended for e-mail servers with typical mailbox capacities where
performance and power efficiency are high priority.
Web Servers
Web severs are usually high traffic systems where read operations are the most common disk
activity as web pages are requested by users. They can be intranet sites with minimal internal
company traffic or global internet portal sites that receive hundreds of thousands of users daily.
Performance is generally the main concern with redundancy and data protection being less of a
concern. For large web sites, there are usually several web servers responding to client requests
and as a result the need for redundancy and data protection is not as important. Also web servers
may not require as much scalability or disk capacity since website content is relatively static and
changes are usually minor content modifications.
Table 11: Web General I/O profile
I/O Profile
(Read/Write)
I/O Profile
(Sequential/Random)
Bandwidth
I/O
Size
Latency
Sensitivity
Growth
Rate
Criticality
95/5
Random
Moderate <
64k
Moderate Low High
Table 12: Web Server RAID Guidelines
Application
RAID Level
0
1
10
5
50
6
60
Database
Recommended
Not Recommended
Possible