HP Surestore Disk Array FC60 HP SureStore E Disk Array FC60 - (English) Advanc - Page 273

Adding a Global Hot Spare Global hot spares provide an additional level of protection for the data on your disk array. A global hot spare automatically replaces a failed disk, restoring redundancy and protecting against a second disk failure. For maximum protection against disk failures it is recommended that you add a global hot spare for each channel. For more information on using global hot spares, see "Global Hot Spares" on page 248. A global hot spare is added using an unassigned disk. If there are no unassigned disks available, you cannot add a global hot spare unless you install a new disk or unbind an existing LUN. CAUTION If you have disks of different capacities in your disk array, always select disks of the largest capacity for your global hot spares. This ensures that any disk failure is protected. See "Global Hot Spare Disks" on page 61 for more information on selecting disks for global hot spares. If a larger disk is used to replace a smaller disk that has failed, the difference in capacity will be unused. For example, if an 18-Gbyte disk is used as a global hot spare for a 9-Gbyte disk, the remaining 9 Gbytes of the global hot spare will be unused. To add a global hot spare: 1. On the main SAM screen, double-click the Disks and File Systems icon. 2. On the Disks and File Systems screen, double-click the Disk Devices icon. The Disk Devices list is displayed. There is an entry for each disk array controller. 3. Select a controller for the appropriate disk array from the Disk Devices list. 4. Select the Actions menu, the Disk Array Maintenance menu option, and then Add Hot Spare. The Add Hot Spare screen is displayed. Managing the Disk Array on HP-UX Managing the Disk Array Using SAM 273