Users Guide

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 drop-down 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.
• Check Consistency
• Encrypt Virtual Disk — Encrypts the virtual disk drive. If the controller is encryption capable, you
can create, change or delete the security keys.
NOTE: The Encrypt Virtual Disk option is available only if the virtual disk is created using the
Self-Encrypting Drive (SED) drives.
• Manage Dedicated Hotspares — Assign or unassign a physical disk as a dedicated hot spare. Only
the valid dedicated hot spares are displayed. If there are no valid dedicated hot spares, then this
section does not appear in the drop-down menu.
For more information about these options, see the iDRAC Online Help.
4. From the Apply Operation Mode drop-down menu, select when you want to apply the settings.
5. Click Apply.
Based on the selected operation mode, the settings are applied.
Managing virtual disks using RACADM
Use the following RACADM commands to manage virtual disks:
237