HP Surestore Disk Array 12h System Administrator's Guide for HP-UX, MPE, and W - Page 28

HP-UX Using the HP-UX System Administration Manager Adding a Disk Adding a Disk At some time you will probably want to add another disk to your array. Features such as hot-pluggable disks and Auto Include simplify the process of adding a disk to the array even while it is operating. A disk can be added to the array without disrupting host operation. After you have added a new disk, you have three options on how to use it: • Increase capacity - you can use the disk to increase the capacity available to the operating system by creating a new LUN. • Improve performance - you can use the disk to improve disk array performance by simply leaving it as unallocated capacity. • Enable Active Spare - you can use the additional capacity to enable Active Spare if the disk array does not currently have the capacity to implement this feature. To add a disk to the array: 1. Make sure the new disk has been inserted into the array cabinet. 2. If Auto Include is on, the disk is automatically added to the array and you can skip to the next step. If Auto Include is off, manually include the disk as described in the next section, "Including a Disk." NOTE! In some situations, the array will not include a disk automatically, even if Auto Include is enabled. This will happen if the new disk's status is not Normal. See "Auto Include" in the HP SureStore E Disk Array 12H User's and Service Manual for more information about when this might occur. 3. Depending on how the new disk will be used, perform the appropriate next step: • To use the disk to increase capacity, create a LUN using all or a portion of the disk capacity. For more information, see "Creating a LUN" in this chapter. • To use the disk to increase performance, leave the disk capacity unallocated. • To use the disk capacity for Active Spare, enable the Active Spare feature if disabled. 28