IBM 86624RY Maintenance Manual - Page 82

Express Configuration provides a quick and easy path for you to automatically configure the ServeRAID controller. This choice creates the most efficient ServeRAID configuration based on the number and capacity of the Ready drives available in the system. If four or more Ready drives of the same capacity are available, this choice also will define a hot-spare drive for the ServeRAID adapter or controller. A hot-spare drive is a physical drive that is defined for automatic use when a similar drive fails. The Express Configuration choice groups up to 16 Ready drives of the same capacity into one disk array and defines one logical drive for each array. This choice defines the size of the logical drive, based on the amount of free space available, and it assigns the highest RAID level possible, based on the number of physical drives available. For example, if the server contains one 1024 MB Ready drive, two 2150 MB Ready drives, and four 4300 MB Ready drives, Express Configuration will create three arrays and one hot-spare drive as follows: Array A: Array B: Array C: Hot Spare: The total capacity of this array is 1024 MB (1 x 1024 MB) and it contains one 1024 MB RAID level-0 logical drive. The total capacity of this array is 4300 MB (2 x 2150 MB) and it contains one 2150 MB RAID level-1 logical drive. The total capacity of this array is 12900 MB (3 x 4300 MB) and it contains one 8600 MB RAID level-5 logical drive. Express Configuration defines one of the four 4300 MB drives as a hot-spare drive, as follows: When there are four or more Ready drives of the same capacity, Express Configuration groups three of the drives into one array (as in Array C) and defines one of the drives as a hot spare. A hot-spare drive must be of equal or greater capacity than the drive that it is intended to replace. In this configuration, the 4300 MB drive can replace any failed drives in Array B or Array C. Using Express Configuration To use the Express Configuration path: 1. Select the ServeRAID controller that you want to configure in the Main Tree. 2. Select the Express Configuration radio button. 3. Select the Next button. 4. Review the information that appears on the Configuration Summary screen. 74 Netfinity Server HMM