All LEDs of an half height LTO-6 drive are flashing with ~ 4 Hz. An LTO-5 tape is still inside, the drive does not react on commands, the flashing continues after a power cycle.
I could not find the error code in the Tandberg manual. The drive is ~3 years old and has just a history of ~15 full backups, the tape was written twice. So I do not expect a mechanical wear, but rather an electronic problem.
This Tandberg LTO-6 drive is an LTO-6 HP drive in individual housings, hence it would also help to know what this code means for the HP LTO-6 drive.
Who knows what the code means and where is it documented?