Reference Guide

The following section provides information about the objects in this group.
Storage.VirtualDisk.BlockSizeInBytes (Read Only)
Description This is a read-only attribute. This property indicates the logical block size of the physical drive that this virtual disk
belongs to.
Legal Values Values: 512 or 4096
Default value Not Applicable
Write Privilege Not Applicable
License Required iDRAC Express or iDRAC Enterprise
Dependency None
Storage.VirtualDisk.DiskCachePolicy (Read or Write)
Description Set the physical disk drive caching policy of all members of a Virtual Disk by enabling the Disk Cache Policy. When
this feature is enabled, the physical disk drive writes data to the physical disk drive cache before writing it to the
physical disk drive. Because it is faster to write data to the cache than to a disk, enabling this feature can improve
system performance.
Legal Values
• Default
• Enabled
• Disabled
Default value Default
Write Privilege Server Control
License Required iDRAC Express or iDRAC Enterprise
Dependency None
Storage.VirtualDisk.ReadPolicy (Read or Write)
Description
The read policies indicate whether or not the controller must read sequential sectors of the virtual disk when seeking
data.
NOTE: Storage.VirtualDisk.ReadPolicy attribute is read-only for few PERCs—for example, H330.
Legal Values
• No Read Ahead
• 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 dierence.
Default value Adaptive
Write Privilege Server Control
Database Objects With Get and Set Commands 463