A SCSI Peripheral Device Type describes the capabilities provided by a SCSI device. It is a five-bit field in the first byte returned in response to an INQUIRY SCSI command.[1]
Defined values are:
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
^Draft of SCSI Primary Commands - 4 (SPC-4 r36d), section 6.6.2 - Standard INQUIRY data.
^Draft of SCSI Primary Commands - 5 (SPC-5 r10), section 6.6.2 - Standard INQUIRY data
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