Dell PowerEdge R830 Integrated Remote Access Controller 8 Version 2.70.70.70 U - Page 197

You must have Login and Server Control privilege to manage the encryption keys. Assigning or unassigning dedicated hot spares A dedicated hot spare is an unused backup disk that is assigned to a virtual disk. When a physical disk in the virtual disk fails, the hot spare is activated to replace the failed physical disk without interrupting the system or requiring your intervention. You must have Login and Server Control privilege to run this operation. Only T10 PI (DIF) capable physical disks can be assigned as a hot spare to T10 PI (DIF) enabled virtual disks. Any non T10 PI (DIF) drives that are assigned as dedicated hot spare will not be a hot spare if T10 PI (DIF) is enabled on a virtual disk later on. You can assign only 4K drives as hot spare to 4K virtual disks. If you have assigned a physical disk as a dedicated hot spare in Add to Pending Operation mode, the pending operation is created but a job is not created. Then, if you try to unassign the dedicated hot spare, the assign dedicated hot spare pending operation is cleared. If you have unassigned a physical disk as a dedicated hot spare in Add to Pending Operation mode, the pending operation is created but a job is not created. Then, if you try to assign the dedicated hot spare, the unassign dedicated hot spare pending operation is cleared. NOTE: While the log export operation is in progress, you cannot view information about dedicated hot spares on the Manage Virtual Disks page. After the log export operation is complete, reload or refresh the Manage Virtual Disks page to view the information. Managing virtual disks using web interface 1. In the iDRAC web interface, go to Overview > Storage > Virtual Disks > Manage. The Manage Virtual Disks page is displayed. 2. From the Controller drop-down menu, select the controller for which you want to manage the virtual disks. 3. For one or more Virtual Disks, from each Action drop-down menu, select an action. You can specify more than one action for a virtual drive. When you select an action, an additional Action drop-down menu is displayed. Select another action from this drop-down menu. The action that is already selected does not appear in the additional Action dropdown menus. Also, the Remove link is displayed next to the selected action. Click this link to remove the selected action. • Delete • Edit Policy: Read Cache - Change the read cache policy to one of the following options: • No Read Ahead • Read Ahead • Adaptive Read Ahead NOTE: Previous generations of PERC controllers support read policy settings of No Read Ahead, Read Ahead, and Adaptive Read Ahead. With PERC 8 and PERC 9, the Read Ahead and Adaptive Read Ahead settings are functionally equivalent at the controller level. For backward compatibility purposes, some systems management interfaces and PERC 8 and 9 controllers still allow setting the read policy to Adaptive Read Ahead. While it is possible to set Read Ahead or Adaptive Read Ahead on PERC 8 or PERC 9, there is no functional difference. • Edit Policy: Write Cache - Change the write cache policy to one of the following options: • Write Through • Write Back • Force Write Back • Edit Policy: Disk Cache - Change the disk cache policy to one of the following options: • Default • Enabled • Disabled • Initialize: Fast - Updates the metadata on the physical disks so that all the disk space is available for future write operations. The initialize option can be completed quickly because existing information on the physical disks is not erased, although future write operations overwrites any information that remains on the physical disks. • Initialize: Full - All existing data and file systems are erased. NOTE: The Initialize: Full option is not applicable for PERC H330 controllers. Managing storage devices 197