Dell PowerVault 221S (SCSI) - Manual (Page 11)

A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS VER A02
PAGE 11 11/17/2005
• 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. Since long term archival storage is indented
in some ways 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 2-13 User Store File Server General IO profile
I/O Profile
(Read/Write)
I/O Profile
(Sequential/Random)
Bandwidth IO Size
Latency
Sensitivity
Growth
Rate
Criticality
80/20 Sequential Heavy >64K High Varies Moderate
• Table 2-14: User Store File Server RAID Guidelines
RAID Level
Application
Concatenated 0 1 10 5 50
File – User
file stores
Recommended Not Recommended Possible
Recommended:
• RAID 5 – Recommended for file servers that require maximum storage
capacity and only base data protection and performance.
• RAID 50 – Recommended for those solutions that require a balance between
storage capacity and performance.
Possible:
• RAID 1 – Possible solution situations which do not require high storage
capacity.
• RAID 10 – Possible solution for situations that require greater availability and
redundancy but not as much disk capacity.
• RAID 0 – While this solution is not fault tolerant, RAID 0 may be useful for file
servers that require better performance and maximum storage capacity, for
example, where backups are expected to maintain data in the event of a failure.
• Concatenated – This solution could be use for situations that require maximum
scalability as drives could be added as storage needs grow. For file servers