CX2550 M1 Upgrade and Maintenance Manual 53
5 Basic software procedures
5.1 Starting the maintenance task
5.1.1 Suspending BitLocker functionality
BitLocker Drive Encryption provides protection for operating system and data
drives by encrypting the contents and requiring users to authenticate their
credentials to access the information. In the scenario described here, BitLocker
uses the compatible Trusted Platform Module (TPM) to detect if the computer's
startup process has been modified from its original state.
I For additional information on how to use BitLocker on a computer without
a compatible TPM, please refer to the "BitLocker Drive Encryption"
documentation page at http://technet.microsoft.com/library/cc731549.aspx.
Suspending BitLocker Drive Encryption is a temporary method for removing
BitLocker protection without decrypting the drive Windows is installed on.
Suspend BitLocker before modifying the server’s hardware configuration or
startup files. Resume BitLocker again after the maintenance procedure is
complete.
V CAUTION!
– With BitLocker features enabled, modifying the system configuration
(hardware or firmware settings) may render the system inaccessible.
The system may enter Recovery Mode and require a 48-digits
recovery password to return to normal operation.
Ensure to suspend BitLocker drive encryption before maintaining the
server.
– When suspended, BitLocker uses a plain text key instead of the
Trusted Platform Module (TPM) to read encrypted files. Keep in mind
that information on this drive is not secure until BitLocker has been
re-enabled.
Ê Ask the system administrator to suspend BitLocker-protection on the system
volume, using the BitLocker Drive Encryption control panel item.
I This will temporarily disable BitLocker for maintenance purposes.
The volume will not be decrypted and no keys will be discarded.
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