Data transfer element (drive) addresses
Data transfer element addresses (DTEs) are determined by the sequence in which the drive is assigned to each logical library.
Drives are assigned to logical libraries by using the Drives by Logical Library page of the tape library GUI. The DTE address for the first drive that is assigned to a new logical library is 257 (X'101'). The DTE address for any other drive that is assigned to the logical library is based on the next available DTE address in that particular logical library. The next available DTE address is the lowest available DTE address after the starting DTE address. This assignment fills any gaps between previously assigned DTE addresses that were created when the assignments for drives were removed or the drives themselves were removed. When a drive assignment is removed from a logical library through the web interface, only that DTE address is made available for future assignment; no other DTE addresses are affected.