You can configure software encryption for disk storage.
Procedure
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From the navigation pane, go to Storage > Disk > disk_storage**. The Disk page appears. 
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Click the disk storage that you want to add software encryption. The disk storage page appears. 
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On the Configuration tab, in the Encryption section, move the Encrypt toggle key to the right. The Add encryption dialog box appears. 
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Enter the encryption details: - 
From the Cipher list, select an encryption method. 
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From the Keylength list, select an encryption key length. 
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Click Save. 
 
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For Key management server, select an existing server, or add a new server. 
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Click Save. 
Related Topics
For information about adding key management servers, see Managing a Key Management Server.
Video: Configure Disk Encryption
To view the process for configuring disk encryption, see the following video.