Quantum DLT 4000 Product Manual page 222

DLT4000 SCSI Interface
SEW and Buffer Size At Early Warning
The Synchronize at Early Warning bit is set to 1. Buffer Size at EW is not supported
and must be zero.
Select Data Compression Algorithm
One enables data compression; a zero disables it.
The front panel setting will override what is specified in the MODE SELECT, but no
error will result. If the front panel is returned to automatic mode, the value from the
last MODE SELECT command will determine whether compression will be used or
not.
8-62 DLT4000/DLT4500/DLT4700 Cartridge Tape Subsystem