Dell PowerVault 221S Optimizing Dell SCSI Solutions - Page 11

A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS VER A02 • 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 I/O Profile (Read/Write) (Sequential/Random) Bandwidth 80/20 Sequential Heavy IO Size >64K Latency Sensitivity High Growth Rate Varies Criticality Moderate • Table 2-14: User Store File Server RAID Guidelines Application File - User file stores Concatenated 0 Recommended RAID Level 1 10 Not Recommended 5 50 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 PAGE 11 11/17/2005