Value |
Device type |
Command set |
Specification
|
00h |
Direct-access block device (e.g., magnetic disk) |
SBC Direct Access Commands |
SCSI Block Commands (SBC)
|
01h |
Sequential-access device (e.g., magnetic tape) |
SSC Sequential Access Commands |
SCSI Stream Commands (SSC)
|
02h |
Printer device |
SSC Printer Commands |
SCSI Stream Commands (SSC)
|
03h |
Processor device |
SPC Processor Commands |
SCSI Primary Commands (SPC)
|
04h |
Write-once device |
SBC Write Once Commands |
SCSI Block Commands (SBC)
|
05h |
CD/DVD-ROM device |
MMC CD-ROM Commands |
SCSI Multimedia Commands (MMC)
|
06h |
Scanner device |
SGC Scanner Commands |
SCSI Graphics Commands (SGC)
|
07h |
Optical memory device (e.g., some optical disks) |
SBC Optical Media Commands |
SCSI Block Commands (SBC)
|
08h |
Medium changer (e.g. jukeboxes) |
SMC Medium Changer Commands |
SCSI Medium Changer Commands (SMC)
|
09h |
Communications device |
SSC Communications Commands |
SCSI Stream Commands (SSC)
|
0Ah–0Bh |
Defined by ASC IT8 (Graphic arts pre-press devices) |
ASC IT8 Prepress Commands
|
0Ch |
Storage array controller device (e.g., RAID) |
SCC Array Controller Commands |
SCSI Controller Commands (SCC)
|
0Dh |
Enclosure services device |
SES Enclosure Services Commands |
SCSI Enclosure Services (SES)
|
0Eh |
Simplified direct-access device (e.g., magnetic disk) |
RBC Reduced Block Commands |
Reduced Block Commands (RBC)
|
0Fh |
Optical card reader/writer device |
OCRW Optical Card Commands |
SCSI Specification for Optical Card Reader/Writer (OCRW)
|
10h |
Reserved for bridging expanders
|
11h |
Object-based Storage Device |
OSD Object-based Storage Commands |
Object-based Storage Commands (OSD)
|
12h |
Automation/Drive Interface
|
13h |
Security manager device
|
14h |
Host managed zoned block device[2] |
|
Zoned Block Commands (ZBC)
|
15h |
|
RMC Simplified Multimedia Commands |
Reduced Multimedia Commands (RMC)
|
16h–1Dh |
Reserved
|
1Eh |
Well known logical unit
|
1Fh |
Unknown or no device type
|