Users Guide

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 — To check the consistency of a virtual disk, select Check Consistency from the corresponding
drop-down menu.
NOTE: Consistency check is not supported on drives set up in RAID0 mode.
● 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 commands to manage virtual disks:
● To delete virtual disk:
racadm storage deletevd:<VD FQDD>
● To initialize virtual disk:
racadm storage init:<VD FQDD> -speed {fast|full}
● To check consistency of virtual disks (not supported on RAID0):
racadm storage ccheck:<vdisk fqdd>
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Managing storage devices