Quantum DLT 4000 Product Manual page 288

DLT4000 SCSI Interface
_________________________ CAUTION _________________________
During the actual reprogramming of the FLASH memory chips, if any
type of powerfail occurs, or if the reprogramming fails part way through,
the subsystem will be unusable, and the controller board will need to be
replaced.
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When the Save operation is successfully completed, the firmware restarts itself,
causing POST to be rerun, and two Unit Attention conditions are generated: power-up
reset, and operating code has changed.
8-128 DLT4000/DLT4500/DLT4700 Cartridge Tape Subsystem