Dell PowerVault 750N, Руководство системного администратора

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3-14
Advanced Disk and Volume Management Using Array Manager
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Rebuild Rate
The Rebuild Rate command changes the rebuild rate settings. The rebuild rate is the
fraction of the compute cycles dedicated to rebuilding failed drives. A rebuild rate of
100 percent means the system is totally dedicated to rebuilding the failed drive.
NOTICE:
The default rebuild rate is 30%. System performance might be degraded if you
change the rebuild rate to a higher value than the default.
The PERC 3 rebuild rate can be configured between 0% and 100%. At 0%, the rebuild is
only done if the system is not doing anything else. At 100%, the rebuild rate has a higher
priority than any other system activity.
Properties
The Properties command displays controller attributes.
To view properties, perform the following steps:
1
Right-click on the appropriate controller.
2
Click Properties .
A Controller Properties dialog box appears displaying Name , Vendor , Status , Type ,
Firmware Version , and Cache Size of the controller.
Disk Management
This section describes conceptual and procedural information about how Array Manager
implements basic and dynamic disks.
The following topics are discussed:
• Writing a disk signature
• Upgrading a basic disk to a dynamic disk
• Reactivating dynamic disks
• Merging foreign disks
Writing a Disk Signature
When you create a virtual disk and perform a rescan, the newly created virtual disk appears
under the
Disks
node. The unsigned disk displays an error bitmap on the icon. The
Disk
Type is Unsigned Disk . The unsigned disk cannot be used cannot be used until it has a
signature on it.