Users Guide

Table Of Contents
Configuring controller properties
You can configure the following properties for the controller:
Patrol read mode (auto or manual)
Start or stop patrol read if patrol read mode is manual
Patrol read unconfigured areas
Check consistency mode
Copyback mode
Load balance mode
Check consistency rate
Rebuild rate
BGI rate
Reconstruct rate
Enhanced auto import foreign configuration
Create or change security keys
Encryption mode (Local Key Management and Secure Enterprise key Manager)
You must have Login and Server Control privilege to configure the controller properties.
Patrol read mode considerations
Patrol read identifies disk errors to avoid disk failures, data loss, or corruption. It runs automatically once a week on SAS and
SATA HDDs.
The Patrol Read does not run on a physical disk in the following circumstances:
The physical disk is an SSD.
The physical disk is not included in a virtual disk or assigned as a hot spare.
The physical disk is included in a virtual disk that is undergoing one of the following:
A rebuild
A reconfiguration or reconstruction
A background initialization
A check consistency
In addition, the Patrol Read operation suspends during heavy I/O activity and resumes when the I/O is complete.
NOTE:
For more information on how often the Patrol Read operation runs when in auto mode, see the respective controller
documentation.
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 fail when the
associated job is started.
Load balance
The Load Balance property provides the ability to automatically use both controller ports or connectors connected to the same
enclosure to route I/O requests. This property is available only on SAS controllers.
Bgi rate
NOTE: Both H330 and H345 require the driver to be loaded for the background initialization operations to run.
248 Managing storage devices