HP P3410A HP NetRAID 1M/2M Installation & Configuration - Page 37

Chapter 4 Planning • If a group contains three to five drives, and you checked Redundancy, the logical drive is assigned RAID level 5. • If an array contains only one drive, the logical drive is assigned RAID level 0. (No redundancy is possible on a logical drive containing just one physical drive.) • Automatic configuration does not create hot spares. You must create your hot spares before you begin automatic configuration. If Automatic configuration will suit your needs, you can proceed to Chapter 5, "Installation and Configuration." However, you are encouraged to read the entire planning section to determine whether a custom configuration would better meet your needs. Custom Configuration To plan a custom configuration, you will do the following: • Plan your arrays • Plan hot spares • Decide the rebuild rate • Plan logical drives Plan Your Arrays ! In this section you specify which physical drives are assigned to which arrays. For each physical disk drive that is assigned to an array, log its array number in Worksheet A. When creating your arrays, please consider the following: • Group together physical drives that have the same capacity. (If you use drives with different capacities in an array, all the drives in the array are treated as though they have the capacity of the smallest drive.) • Arrays are numbered sequentially beginning with Array 0. • Each array can contain one or more physical drives. • The more disks you group together in an array, the better the performance. • All physical drives in an array must be controlled by the same adapter. 29