Home > Storage > Unity XT > Virtualization, Cloud & Applications > Dell Unity XT: Microsoft SQL Server Best Practices > Data at Rest Encryption
Data at Rest Encryption (D@RE) is controller-based encryption that does not impact system performance. Dell Technologies recommends ordering Dell Unity XT systems as encryption-enabled, if appropriate for your environment.
Note: Encryption can only be enabled at the time of system installation with the appropriate license.
If encryption is enabled, Dell Technologies recommends making external backups of the encryption keys after system installation and immediately following any change in the system’s drive configuration. This includes creating or expanding a storage pool, adding new drives or replacing a faulted drive. Additional information regarding Data at Rest Encryption can be found in the Dell Unity XT: Data at Rest Encryption white paper.