Users Guide

Related Information:
l "Check Consistency"
l "Cancel Check Consistency"
Set Reconstruct Rate
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Does my controller support this feature? See "Supported Features."
The Set Reconstruct Rate task changes the amount of system resources dedicated to the reconstruct task.
The reconstruct task remakes the virtual disk after you have changed the RAID level or otherwise reconfigured the virtual disk. The reconstruct rate,
configurable between 0% and 100%, represents the percentage of the system resources dedicated to running the reconstruct task. At 0%, the reconstruct
will have the lowest priority for the controller, will take the most time to complete, and will be the setting with the least impact to system performance. A
reconstruct rate of 0% does not mean that the reconstruct is stopped or paused.
At 100%, the reconstruct will be the highest priority for the controller, will minimize the reconstruct time, and will be the setting with the most impact to system
performance.
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To change the controller's reconstruct rate:
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1. Type a numerical value in the New Reconstruct Rate text box. The value must be within the 0 – 100 range.
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2. Click Apply Changes. If you want to exit and cancel your changes, click Go Back to Previous Page.
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To locate this task in Storage Management:
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1. Expand the Storage tree object to display the controller objects.
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2. Select a controller object.
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3. Select the Information/Configuration subtab.
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4. Select Set Reconstruct Rate from the Available Tasks drop-down menu.
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5. Click Execute.
You can also locate this task from the Change Controller Properties drop down menu. For more information, see "Change Controller Properties."
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Related Information:
l "Virtual Disk Task: Reconfigure (Step 1 of 3)"
Redundant Path Configuration
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Does my controller support this feature? See "Supported Features."
This feature is supported only on SAS controllers with firmware version 6.1 or later., which can be connected to enclosures (and not backplanes). The
supported enclosures are Dell PowerVault MD1000 and PowerVault MD1120. This feature enables load balancing by faster processing of I/O requests.
In a redundant path configuration, connect both the connectors of a SAS enclosure—which must be in a unified mode—to both connectors of a controller.
Storage Management detects this configuration and displays it on the user interface as a redundant path configuration. The two connectors (Connector 0 and
Connector 1) that were previously available are now replaced with one Logical Connector.
In a daisy-chain scenario, more than one enclosure can be connected to a controller in a redundant path mode. You can connect up to three PowerVault
MD1000 and MD1120 to a PERC 6/E controller in a daisy-chained enclosure. And, you can connect up to four PowerVault MD1200 and MD1220 to a PERC H800
controller in a daisy-chained enclosure. See the figure below for an example of a daisy chain configuration (for PERC 6/E controller.)
NOTE: This feature requires that the physical devices connected to the controller have the latest firmware. For the latest supported firmware, see the
Dell Support website at support.dell.com.