Dell PowerVault 221S (SCSI) - Manual (Page 7)

A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS VER A02
PAGE 7 11/17/2005
• RAID 10 – Recommended for enterprise mission critical e-mail servers where
availability and redundancy and/or performance are the highest priority and
reduce storage capacity is acceptable.
• RAID 5 – Recommended for e-mail servers that require maximum storage
capacity and only base data protection and performance.
• RAID 50 – Recommended for those solutions that require greater redundancy
and data protection and a balance between storage capacity and performance.
Possible:
• RAID 1 – Possible solution for small e-mail servers which do not require high
storage capacity.
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.
Database Servers
Database servers can range from simple workgroup databases like Microsoft® Access
with a few hundred users to mission critical enterprise databases like Oracle or SQL
Server with thousands of users. Database applications will always benefit from some data
protection while other requirements such as performance and availability will vary. As a
general rule, the more mission critical the database is, the more data protection is
required. Additionally, the performance requirements increase relative to the number of
users accessing the database.
• Table 2-5: Database General IO profile
I/O Profile
(Read/Write)
I/O Profile
(Sequential/Random)
Bandwidth IO Size
Latency
Sensitivity
Growth
Rate
Criticality
70/30 Random Heavy 8K High High High
• Table 2-6: Database sever RAID Guidelines
RAID Level
Application
Concatenated 0 1 10 5 50
Database
Recommended Not Recommended Possible
Recommended:
• RAID 10 – Recommended for enterprise mission critical database solutions
where availability and redundancy and/or performance are the highest priority.