Kodierungsmethode

摘要

A tape drive subsystem uses variable length symbols to identify reliably data stored on the tape, in particular, serial numbers of tape cartridges having different track densities. A variable length symbol code is encoded on the tape in a plurality of groups G1 to G48 with each group having a first logical state or "1" being represented as an erase gap signal (ERG) covering the first two units of a group, or a second logical state or "0" represented as an ERG signal covering the first unit of the group, both followed by an inter-block gap signal (IBG) covering four units of the group.