ASCSI 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 |
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