Dell PowerVault DL2000 - Manual (Page 17)

Disk Configuration Policies
You can select one of the following disk configuration policies on the Settings tab in the PowerVault DL Backup To Disk
Appliance Console, if the disk subsystem state is standard. For more information on disk subsystem states, see the topic
“Disk Subsystem States”.
NOTE: If the disk subsystem state is advanced, the disk configuration policy is automatically set to manual.
Automatic With Confirmation Policy
The backup application automatically configures available physical disks. You must accept or reject the proposed disk
configuration.
NOTE: It is recommended that you use Automatic With Confirmation policy.
Automatic Without Confirmation Policy
The backup application automatically configures available physical disks.
NOTE: Automatic configuration occurs only when the system is in a standard configuration state.
Manual Disk Policy
This policy disables automatic disk configuration. You must manually configure the physical disks using Server
Administrator to be used by the backup application. This disk policy is recommended only for advanced users.
If you select manual disk policy, see the topic Launching Symantec Backup Exec after configuring the appliance.
Selecting Deduplication Controller
If you select either of the automatic disk configuration policies, the PowerVault DL Backup to Disk Appliance
Configuration Wizard prompts you to select the storage controller type (external or internal) indicating where Backup
Exec creates the depulication storage folder (DSF) or the deduplication disk storage (DDS).
The deduplication option is a value-add feature of Backup Exec 2010 and later versions. The option requires a license. If
you purchased the deduplication option with the system, the deduplication option and license key are pre-installed. You
can evaluate the deduplication option for 60 days by selecting the deduplication option during the Backup Exec software
installation without entering a deduplication license key.
If the deduplication option is enabled and the disk configuration policy is set to Automatic, Backup Exec creates a DSF
or DDS on the first virtual disk available on the controller type selected. The DSF or DDS virtual disk is created based on
one of the standard configurations as shown in the topic “Disk Subsystem States”.
Recommended Deduplication Controller Settings
• On the DL2100, the recommended controller for deduplication is the external controller. On the DL2200, the
recommended controller for deduplication is the internal controller.
• If the appliance configuration does not contain an external PERC adapter, the default controller type is internal.
The internal data drives, if present, are used to create a single virtual drive to contain the DSF or DDS. If the
appliance configuration only supports the automatic creation of a single virtual disk to contain the DSF or DDS,
no additional virtual disks are created.
To support DSF or DDS and one or more backup to disk virtual disks, you may either choose one of the following options:
• Add additional physical disk storage to the appliance.
• Return to the Disk Configuration Policy screen by clicking on the Back button in the PowerVault DL Backup to
Disk Appliance Configuration Wizard and select the manual disk configuration policy. Using the PowerVault
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