Quantum DLT 4000 Product Manual page 217

DLT4000 SCSI Interface
The RLEC bit indicates whether the DLT4000 drive should return Check Condition
status with the sense key set to Unit Attention (6h) when one of its write and read
error counters of the log pages reaches a specified threshold as follows: (See LOG
SELECT command section on how to change the threshold.)
0 - Do not return Unit Attention when a threshold condition is met
1 - Return Unit Attention when a threshold condition is met
Queue Algorithm Modifier
This field must be 0.
QErr (Queue Error)
This bit must be 0.
DQue (Disable Queuing)
This bit must be 0.
EECA (Enable Extended Contingent Allegiance)
The DLT4000 drive does not support extended contingent allegiance, so this bit must
be 0.
RAENP (Ready AEN Permission)
The DLT4000 drive does not support asynchronous event notification (AEN), so this
bit must be 0.
UAAENP (Unit Attention AEN Permission)
The DLT4000 drive does not support asynchronous event notification, so this bit must
be 0.
Ready AEN Holdoff Period
The DLT4000 drive does not support asynchronous event notification, so this field
must be 0.
DLT4000/DLT4500/DLT4700 Cartridge Tape Subsystem 8-57