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READ POSITION Command (34h) SDLT 600 SCSI Interface Guide

4-192 January 2005 81-81200-02 REV A01

4.18.2 Read Position Data — Long Form

Data returned when the service action value is 6 takes the following form:

Figure 4-101. READ POSITION (Long Form) — Data Format

Bit

Byte

7 6 5 4 3 2 1 0

0 BOP EOP Reserved MPU LONU Reserved

1 – 3 Reserved

4 – 7

(MSB)

Partition Number

(LSB)

8 – 15

(MSB)

Logical Object Number

(LSB)

16 – 23

(MSB)

Logical File Identifier

(LSB)

24 – 31

(MSB)

Logical Set Identifier

(LSB)

Table 4-112. READ POSITION (Long Form) Data — Field Descriptions

Field Name Description

BOP Beginning of Partition. When set to 1, indicates that the drive is at the

Beginning of Partition (BOP) in the current partition. When set to 0,

indicates that the current logical position is not at BOP. Since SDLT tape

drives do not support more than one partition, the value of this field is 1

when at BOT.

EOP End of Partition. When set to 1, indicates that the drive is positioned

between early warning and the End of Partition (EOP) in the current

partition. When set to 0, indicates that the current logical position is not

between early warning and EOP.

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Quantum 1200 Series DAT Autochanger Guía de usuario Pagina 234