Quantum ATL SuperLoader ATL, User Manual

Page: 190 / 196

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) on page 172 (LTO
only)
0010b Write Data Mode (0010b) on page 172 (LTO only)
0100b Download Microcode Mode (0100b) on page 173
0101b Download Microcode and Save Mode (0101b) on page 173
1010b Write Data to Echo Buffer (1010b) on page 173
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) on page 173 and Download
Microcode and Save Mode (0101b) on page 173 for the appropriate settings.