SCSI Peripheral Device Type

A SCSI Peripheral Device Type is a way of describing what capabilities are provided by a SCSI device. It is a five-bit field which can be found in the Standard Inquiry Data provided in response to an Inquiry Command. This field was defined in the very early days of SCSI and is now too small. The possible values are:

• • 00h - direct-access device (e.g., magnetic disk)
  • 01h - sequential-access device (e.g., magnetic tape)
  • 02h - printer device
  • 03h - processor device
  • 04h - write-once device
  • 05h - CDROM device
  • 06h - scanner device
  • 07h - optical memory device (e.g., some optical disks)
  • 08h - medium Changer (e.g. jukeboxes)
  • 09h - communications device
  • 0Ah-0Bh - defined by ASC IT8 (Graphic arts pre-press devices)
  • 0Ch - Storage array controller device (e.g., RAID)
  • 0Dh - Enclosure services device
  • 0Eh - Simplified direct-access device (e.g., magnetic disk)
  • 0Fh - Optical card reader/writer device
  • 10h - Reserved for bridging expanders
  • 11h - Object-based Storage Device
  • 12h - Automation/Drive Interface
  • 13h-1Dh - reserved
  • 1Eh - Well known logical unit
  • 1Fh - unknown or no device type

External links

• Draft of SCSI Primary Commands - 3 (SPC-3)

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