Quantum DLT 4000 Product Manual page 247

These indicate how full/empty the buffer memory should be before restarting the
writing/reading of the media. The DLT4000 drive will set these fields to zero (unused)
ratios according to the average data rates over the SCSI bus.
Write Delay Time
before forcing the data to tape (100 ms increments). Note that the buffer full/empty
ratio, which is dynamic, can cause data to be written sooner than the Write Delay time
be flushed in 20 seconds. Maximum value is 6500 (1964h) and the minimum is 15
(Fh). This represents delays from almost 11 minutes down to 1.5 seconds.
DBR–set to 0 (Data buffer recovery not supported)
BIS–set to 1 (Block Identifiers Supported in media format)
AVC–set to 0
SOCF–set to 0
REW–set to 0 (Do not report Early Warning EOM on reads)
This field is not used and is set to zero.
EOD Defined
EEG
The Enable EOD Generation bit is set to indicate that the drive will generate an EOD.
type operation.
SEW and Buffer Size at Early Warning
supported and will be zero.
Select Data Compression Algorithm
DLT4000/DLT4500/DLT4700 Cartridge Tape Subsystem -87