Command Descriptor Block - Tandberg Data SLR7-140 PROGRAMMER Manual

BYTE BIT 7
00 Operation Code 34h
01 Logical Unit Number (LUN)
02 RESERVED
03 RESERVED
04 RESERVED
05 RESERVED
06 RESERVED
07 RESERVED
08 RESERVED
09 Control Byte
Table 20-1:
TCLP
LONG
BT
Tandberg Data

20.2. Command Descriptor Block

6 5
READ POSITION Command Descriptor Block
The Total Current Logical Position (TCLP) bit must be
set to zero.
The Long Format bit must be set to zero.
The Block Address Type (BT) bit controls the content of
the data returned.
When the BT is set to zero, the block locations returned
gives the total number of logical blocks and tapemarks
from the beginning
position.
When the BT bit is set to one, the block locations
returned gives
(including tapemarks,
beginning of the partition to the current position.
When using a SLRtape140 to SLRtape7 or SLR32 medium the
BT bit must be set to zero.
On the SLR140, SLR100, SLR75, SLR60 and SLR7 drives the
BT bit must always be set to zero.
20-2 Tandberg SLR Product Line SCSI Functional Specifications
4 3
RESERVED
of the partition
the total number
filler blocks
Read Position
2 1
TCLP LONG
to the current
of physical blocks
etc.) from
0
BT
the