Users Guide

Table Of Contents
SMART performs predictive failure analysis on each disk and sends alerts if a disk failure is predicted. The controllers check
physical disks for failure predictions and, if found, pass this information to iDRAC. iDRAC immediately logs an alert.
Controller operations in non-RAID mode or HBA mode
If the controller is in non-RAID mode (HBA mode), then:
Virtual disks or hot spares are not available.
Security state of the controller is disabled.
All physical disks are in non-RAID mode.
You can perform the following operations if the controller is in non-RAID mode:
Blink/unblink the physical disk.
Configure all properties including the following:
Load balanced mode
Check consistency mode
Patrol read mode
Copyback mode
Controller boot mode
Enhanced auto import foreign configuration
Rebuild rate
Check consistency rate
Reconstruct rate
BGI rate
Enclosure or backplane mode
Patrol read unconfigured areas
View all properties that are applicable to a RAID controller expect for virtual disks.
Clear foreign configuration
NOTE: If an operation is not supported in non-RAID mode, an error message is displayed.
You cannot monitor the enclosure temperature probes, fans, and power supplies when the controller is in non-RAID mode.
Running RAID configuration jobs on multiple storage controllers
While performing operations on more than two storage controllers from any supported iDRAC interface, make sure to:
Run the jobs on each controller individually. Wait for each job to complete before starting the configuration and job creation
on the next controller.
Schedule multiple jobs to run at a later time using the scheduling options.
Manage Preserved cache
The Managed Preserved Cache feature is a controller option which provides the user an option to discard the controller cache
data. In the write-back policy, data is written to the cache before being written to the physical disk. If the virtual disk goes
offline or is deleted for any reason, the data in the cache gets deleted.
The PREC Controller preserves the data written on the preserved or dirty cache in an event of power failure or cable disconnect
until you recover the virtual disk or clear the cache.
The status of the controller is affected by the preserved cache. The controller status is displayed as degraded if the controller
has preserved cache. Discard the preserved cache is possible only if all of the following conditions are met:
The controller does not have any foreign configuration.
The controller does not have any offline or missing virtual disks.
Cables to any virtual disk are not disconnected.
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Managing storage devices