116 Commands
The Long bit and the TCLP bit must be equal. If they are not, the command will
terminate with
CHECK CONDITION status. The sense key will be set to ILLEGAL
REQUEST
with additional sense of 2400h (invalid field in CDB).
Returned Data—Short Read Position:
The format of the 20 bytes of data returned in short format for READ POSITION
is as follows:
Returned Data Fields:
BT Block address Type
0 This bit is not supported and must be set to zero. The offset into the current
partition represents the count of all blocks and filemarks between the beginning
of the media and the current logical position.
7 6 5 4 3 2 1 0
0
BOP EOP Reserved (0) BPU Reserved (0)
1
Partition Number (0)
2
Reserved (0)
3
Reserved (0)
4
(MSB)
First Block Location
7
(LSB)
8
(MSB)
Last Block Location
(same as First Block Location)
11
(LSB)
12
Reserved (0)
13
(MSB)
Number of blocks in buffer (0)
15
(LSB)
16
(MSB)
Number of bytes in buffer (0)
19
(LSB)
BOP 0 The current logical position is not at BOM (beginning of media).
1 The current logical position is at BOM.
EOP 1 The current logical position is within the EW-EOM region.
