Reference Guide

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
License Required iDRAC Express or iDRAC Enterprise
Dependency None
Storage.VirtualDisk.T10PIStatus (Read or Write)
Description This property indicates if T10 PI is enabled or disabled on this virtual disk.
NOTE: Can be disabled only if the current value for this object is enabled.
Legal Values
• 0 — Disabled
• 1 — Enabled
Default value 0 — Disabled
Write Privilege Server Control
License Required iDRAC Express or iDRAC Enterprise
Dependency None
Storage.VirtualDisk.WritePolicy (Read or Write)
Description
The write policies specify whether or not the controller sends a write-request completion signal as soon as the
data is in the cache or after it has been written to disk.
NOTE: Storage.VirtualDisk.WritePolicy attribute is read-only for few PERCs—for example, H330.
Legal Values
• Write Through
• Write Back
• Force Write Back
Default value WriteBack
Write Privilege Server Control
License Required iDRAC Express or iDRAC Enterprise
Dependency None
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