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Chapter 3 Media Changer Commands
Write Buffer Command (3Bh)
172
Quantum ATL SuperLoader Software Interface Guide
Table 71 Write Buffer
Command Data
Write Combined
Header and Data
Mode (0000b)
3
LTO only: The data to be transferred is preceded by a 4-byte
header consisting entirely of reserved bytes. This header is
discarded (not stored within the buffer). The buffer offset field
must be 0 for this mode.
Write Data Mode
(0010b)
3
LTO only: Similar to Header and Data Mode, except there is no
header in the data passed to the target. Any potential buffer
overruns are detected and the command is rejected.
Field
Description
Mode
The media changer supports the following values within the field. If any other
value is set, the media changer terminates the command with CHECK
CONDITION status and an ILLEGAL REQUEST sense key set.
Mode
Description
0000b
Write Combined Header and Data Mode (0000b)
only)
0010b
0100b
Download Microcode Mode (0100b)
0101b
Download Microcode and Save Mode (0101b)
1010b
Write Data to Echo Buffer (1010b)
Buffer ID
For all of the modes described for the Mode field, only a Buffer ID of 0 is
supported. If the Buffer ID field is a value other than 0, the command is
rejected. The target detects and rejects commands that would overrun the
buffer.
Buffer Offset
See
Download Microcode Mode (0100b)
Microcode and Save Mode (0101b)
on page 173 for the appropriate settings.
Summary of Contents for ATL SuperLoader ATL
Page 1: ...ATL SuperLoader DLT and ATL SuperLoader LTO Software Interface Guide 81 60220 01 A02...
Page 18: ...Preface Document Conventions xviii Quantum ATL SuperLoader Software Interface Guide...
Page 44: ...Chapter 2 Messages Supported SCSI Messages 26 Quantum ATL SuperLoader Software Interface Guide...
Page 196: ...Index 178 Quantum ATL SuperLoader Software Interface Guide...