User's Manual

DLT4000 SCSI Interface
8-26 DLT4000/DLT4500/DLT4700 Cartridge Tape Subsystem
The command specific bits are used as follows:
• Immed - If this bit is set, status is returned as soon as the operation is started.
Otherwise, the status is returned after the operation has completed.
• Re-Ten - Re-tension operations are not needed on the DLT4000 drive, so this bit
is ignored (that is, good status, if the bit is set).
• Load - When a cartridge is inserted, the media is automatically loaded and
positioned by the drive at BOM. Logically, the drive will be positioned at the
beginning of Partition 0.
If the Load bit is set, and the media is already loaded, no action is taken. If the
media was unloaded but the cartridge was not removed, a Load will cause it to be
loaded to BOP again and made ready.
If the Load bit is zero and media is loaded, the drive writes any buffered data and
filemarks to the tape and rewinds the tape to BOM and unloads the media into the
DLT4000 cartridge. The green Operate Handle light turns on and the cartridge
can be removed from the drive. If the media is already unloaded, no action is
taken.
• EOT - This bit is ignored by the DLT4000 drive, unless both the EOT and Load
bits are both set, then the drive returns CHECK CONDITION, ILLEGAL
REQUEST.