Data Format; Table 20-2: Read Position Data - Tandberg Data SLR7-140 PROGRAMMER Manual

BYTE BIT 7
00 BOP
01 Partition Number
02 RESERVED
03 RESERVED
04
 First Block Location
07
08
 Last Block Location
11
12 RESERVED
13
 Number of Blocks in Buffer
15
16

Number of Bytes in Buffer
19
BOP
EOP
BCU
BYCU
Tandberg Data

20.3. Data Format

6 5
EOP BCU
Table 20-2: READ POSITION Data
A beginning of partition (BOP) bit indicates that the
current tape position is at the beginning-of-partition.
A possible read command will read the very first block
on the current partition. A possible write command will
start writing the
partition.
An end of partition (EOP) bit of one indicates that the
current logical tape position is located between the
Logical Early Warning (LEW) tape marker and the end-of-
partition (see also the sections on the READ and WRITE
commands)
The block count unknown (BCU) bit is always set to one
to indicate that the Number of Blocks in Buffer field
does not represent the actual number of blocks in the
buffer.
The byte count unknown (BYCU) bit is always set to one
to indicate that the Number of Bytes in Buffer field
does not represent the actual number of bytes in the
buffer.
20-3 Tandberg SLR Product Line SCSI Functional Specifications
4 3
BYCU R
very first block
Read Position
2 1
BPU PERR
on the current
0
R