Specifications

ATAPI For Streaming Tape QIC-157 Rev B

6.8.10. READ POSITION Command

The READ POSITION command reports the current logical position of the Device. No medium

movement shall occur as a result of the command.

Table 6-59 Read Position Command

Bit

Byte

7 6 5 4 3 2 1 0

0 Operation code (34h)

1 Reserved 0 (BT)

2 Reserved

3 Reserved

4 Reserved

5 Reserved

6 Reserved

7 Reserved

8 Reserved

9 Reserved

10 Reserved

11 Reserved

A Block Type (BT) bit of zero indicates the value(s) returned in the Read Position Data , First and

Last Block Location fields shall be interpreted as a sequential logical block address(es) with block

zero originating at the beginning-of-partition.

If the Device is not capable of reporting block locations, the BPU bit shall be set to one in the returned

data. A REWIND/LOCATE operation may recover from this condition.

The READ POSITION data shown in Table 6-60 shall be returned as data after the command.