SCSI Peripheral Device Type

Short description: Description field for SCSI devices

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

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|
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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

## References

1. ↑ Draft of SCSI Primary Commands - 4 (SPC-4 r36d), section 6.6.2 - Standard INQUIRY data.
2. ↑ Draft of SCSI Primary Commands - 5 (SPC-5 r10), section 6.6.2 - Standard INQUIRY data

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