Dell PowerVault TL4000 Faq - Page 25

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Also for Dell PowerVault TL4000: Release Notes (3 pages), Getting Started (38 pages), Quick Start Manual (7 pages), Software Manual (16 pages), Configuration Manual (22 pages), Important Information Manual (10 pages), User Manual Addendum (2 pages), Getting Started Manual (3 pages), Attachment Instructions (17 pages), Brochure (4 pages), User Manual (20 pages)

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How does EKM handle the addition of new drives or the replacement

of bad drive?

New or replacement drives can be added to the EKM through auto discovery

or manually. To auto discover the drives, check the auto discovery checkbox

on the EKM Server Configuration tab in the EKM GUI. To add the drives

manually, follow the instructions in the Encryption Key Manager User's Guide

to add the drives through the command line interface.

It is recommended to use auto discovery as the 12-digit drive serial number

(10 digit serial number plus two leading zeros) must be entered to add the drive

manually. If security is a concern, auto discovery can be turned on and test

backups run to add the necessary drives to the drive table. Then auto discovery

can be turned off to prevent new drives from obtaining keys.

As long as EKM can authenticate the drive digital signature assigned to the

drive at the factory, EKM accepts the key request. The keys are grouped in the

key store in key groups and the key groups can be associated with the

new/replacement drives after the drives are added.

How does EKM handle the addition of a new library or the replacement

of a bad library?

In library-managed encryption, the library is only a proxy. Libraries can be

added or replaced and keys provided as long as the EKM can authenticate to

the digital signature on the drive.

The data is compressed prior to being encrypted as encrypted data is

generally uncompressible. Therefore compression has no effect on

encryption and vice versa.

There can be a slight performance impact with encryption but it should not

cause an increase in the backup window.

Dell Encryption Key Manager and Library Managed Encryption