User`s guide

A REFERENCE GUIDE FOR OPTIMIZING DELL™ MD1000 SAS SOLUTIONS VER A00
PAGE 31 5/06/2005
Table13: Archival File Server RAID Guidelines
RAID Level
Application
Concatenated 0 1 10 5 50
File -
Archival
Recommended Not Recommended Possible
Recommended:
• RAID 10 – Recommended due to high availability, redundancy, and good performance.
• RAID 5 – Recommended for file servers that require maximum storage capacity and
moderate data protection and performance.
• RAID 50 – Recommended for those solutions that require a balance between storage
capacity and performance.
Possible:
• RAID 1 – Possible solution in situations which do not require high storage capacity.
Not recommended:
• RAID 0, Concatenated - These are not recommended due to lack of redundancy and data
protection. Even for long term archival storage which is intended to be a backup of
important files, it is not a recommended solution.
Note: While these configurations are not recommended, they can be configured and utilized.
User file store characteristics and recommendations
Table 14: User Store File Server General IO profile
I/O Profile
(Read/Write)
I/O Profile
(Sequential/Random)
Bandwidth
I/O
Size
Latency
Sensitivity
Growt
h Rate
Criticality
80/20 Sequential Heavy >64k High Varies Moderate
Table 15: User Store File Server RAID Guidelines
RAID Level
Application
Concatenated 0 1 10 5 50
File – User
file stores
Recommended Not Recommended Possible