Pioneer SCSI-2 - Manual (Page 13)

Preface
- 1 -
1. PREFACE
These specifications define the SCSI command set that defines the interface between a host computer and
such primary devices as CD-ROM drives and CD-R writers.
These are the control functions for the Pioneer DRM/DR-U series CD-ROM drives. For specific models,
refer to Section 1.1 below.
For details of the common standard of SCSI, refer to ANSI SCSI-2 working draft X3T9.2 revision 10K.
For details regarding the use of the compact disc as a SCSI CD-ROM device, refer to the proposal made
after the ANSI SCSI-2 working draft X3T9.2 revision 10K.
For Compact Disc, CD-ROM disc, and CD-R disc specifications, refer to the Red Book, Yellow Book and
Orange Book Part2.
For file system specifications, refer to ISO 9660.
For details about the use of SCSI Bus, refer to the installation manuals of the particular drives.
For more information on player control commands (mnemonic commands), refer to Appendix B of this
document and/or Pioneer Industrial LaserDisc Player (any model) User’s Manuals.
THESE SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.
1.1 DRM/DR-U Series
The six-disc DRM series drives are SCSI-2 1 CD-ROM minichangers using a single movable
optical assembly and a removable Pioneer-developed 6-disc CD magazine. Six discs may be
stored in individual trays in the magazine. Each tray swings out of the magazine into the drive
assembly. Only one disc may be read at a time. The minichanger appears on the SCSI bus as one
SCSI ID with six (6) logical units (0-5), one logical unit assigned per disc. The assignment of
logical units to discs may be changed at any time.
1 DRM-604X is the only minichanger that supports both the SCSI-1 and SCSI-2 command sets. Please refer to Pioneer’s DRM-600
Series SCSI Command Reference Manual for details on the SCSI-1 command set.