Users Guide

The check consistency rate, configurable between 0% and 100%, represents the percentage of the system resources dedicated
to running the check consistency task. At 0%, the check consistency has the lowest priority for the controller, takes the most
time to complete, and is the setting with the least impact to system performance. A check consistency rate of 0% does not
mean that the check consistency is stopped or paused. At 100%, the check consistency is the highest priority for the controller.
The check consistency time is minimized and is the setting with the most impact to system performance.
Create or change security keys
When configuring the controller properties, you can create or change the security keys. The controller uses the encryption key
to lock or unlock access to SED. You can create only one encryption key for each encryption-capable controller. The security
key is managed using the Local Key Management (LKM) feature. LKM is used to generate the key ID and the password or key
required to secure the virtual disk. If you are using LKM, you must create the encryption key by providing the Security Key
Identifier and the Passphrase.
This task is not supported on PERC hardware controllers running in HBA mode.
If you create the security key-in Add to Pending Operation mode and a job is not created, and then if you delete the security
key, the create security key pending operation is cleared.
Configuring controller properties using web interface
1. In the iDRAC web interface, go to Overview > Storage > Controllers > Setup.
The Setup Controllers page is displayed.
2. In the Configure Controller Properties section, from the Controller drop-down menu, select the controller that you want
to configure.
3. Specify the required information for the various properties.
The Current Value column displays the existing values for each property. You can modify this value by selecting the option
from the Action drop-down menu for each property.
For information about the fields, 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.
Configuring controller properties using RACADM
● To set Patrol Read Mode:
racadm set storage.controller.<index>.PatrolReadMode {Automatic | Manual | Disabled}
● If Patrol read mode is set to manual, use the following commands to start and stop Patrol read Mode:
racadm storage patrolread:<Controller FQDD> -state {start|stop}
NOTE:
Patrol read mode operations such as Start and Stop are not supported if there are no virtual disks available in
the controller. Though you can invoke the operations successfully using the iDRAC interfaces, the operations will fail
when the associated job is started.
● To specify the Check Consistency Mode, use Storage.Controller.CheckConsistencyMode object.
● To enable or disable the Copyback Mode, use Storage.Controller.CopybackMode object.
● To enable or disable the Load Balance Mode, use Storage.Controller.PossibleloadBalancedMode object.
● To specify the percentage of the system's resources dedicated to perform a check consistency on a redundant virtual disk,
use Storage.Controller.CheckConsistencyRate object.
● To specify the percentage of the controller's resources dedicated to rebuild a failed disk, use
Storage.Controller.RebuildRate object
● To specify the percentage of the controller's resources dedicated to perform the background initialization (BGI) of a virtual
disk after it is created, useStorage.Controller.BackgroundInitializationRate object
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Managing storage devices