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SDLT 600 SCSI Interface Guide Chapter 4: SCSI Commands

81-81200-02 REV A01 January 2005 4-239

4.33 SPACE Command (11h)

The SPACE command provides a variety of positioning functions that are determined by the Code and

Count fields in the Command Descriptor Block. This command provides both forward (toward End of

Medium / End of Partition) and reverse (toward Beginning of Medium / Beginning of Partition)

positioning.

Figure 4-129. SPACE Command Descriptor Block — Data Format

Bit

Byte

7 6 5 4 3 2 1 0

0 Operation Code (11h)

1 Reserved Code

2 – 4

(MSB)

Count

(LSB)

5 Control

Table 4-141. SPACE Command Data — Field Descriptions

Field

Name

Description

Code The code can be one of the following values. All other values are reserved.

Space Code Space By

0000b Logical Blocks

0001b Filemarks

0010b Sequential Filemarks

0011b End-of-Data

0100b Setmarks

0101b Sequential Setmarks

SDLT 600

SCSI Interface Guide

SCSI Commands

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Quantum 1200 Series DAT Autochanger Guide de l'utilisateur Page 281