Events can occur where there is a need to recover data located beyond the logical end-of-data (EOD) mark of a tape cartridge. For example, a volume that was accidentally scratched and is now being reused from the beginning of tape (BOT). When this happens with unencrypted data, you can sometimes use a recovery utility to try to salvage as much of the remaining data on the tape as possible. With encrypted data, access to the previous set of keys (EEDK structures) is critical to this recovery process. Because saving the existing EEDK structures on the tape could introduce a security exposure, the default operation of the drive is to destroy the existing EEDK structures on the tape. When the EEDKs have been destroyed, encrypted data cannot be recovered beyond the newly written EOD mark. However, any data previously written in a non-encrypted format that was not overwritten with encrypted data is still potentially recoverable.