Quantum Instruments DLT 7000 manual Read Position Data Field Descriptions, Eop, Bpu

SCSI Commands

READ POSITION Command (34h) (continued)

Table 5–66 READ POSITION Data - Field Descriptions
Field Name	Description
BOP	Beginning of Partition. When set to 1, indicates that the logical unit is
	at the beginning of partition in the current partition. When 0,
	indicates that the current logical position is not at the beginning of
	partition. Since the tape drive does not support more than one
	partition, the value of this field will be 1 when at BOT.
EOP	End of Partition. When set to 1, indicates that the logical unit is
	positioned between early warning and the end of partition in the
	current partition. When 0, it indicates that the current logical position
	is not between early warning and end of partition.
BPU	Block Partition Unknown. This bit is never set: the setting of the Block
	Type (BT) bit of READ POSITION CDB does not affect the block address
	values returned.
First Block Location	The block address associated with the current logical position: the
	next block to be transferred between the target and initiator if a READ
	or WRITE command is issued.
Last Block Location	The block address associated with the current physical position: the
	next block to be transferred to tape medium and from the target’s
	buffer. If the buffer is empty, or has only a partial block, the same
	value as First Block Location is reported. The first block or filemark
	written onto the tape medium is at address 0.
Number of Bytes in Buffer	The number of data blocks in the target’s buffer.
Number of Bytes in Buffer	The number of data bytes in the buffer that have not been written to
	the tape medium.

Quantum DLT 7000 Tape System 5-139