SCSI Peripheral Device Type
Encyclopedia
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 first byte provided in response to an Inquiry Command
. The currently defined values are:
SCSI
Small Computer System Interface is a set of standards for physically connecting and transferring data between computers and peripheral devices. The SCSI standards define commands, protocols, and electrical and optical interfaces. SCSI is most commonly used for hard disks and tape drives, but it...
device. It is a five-bit field which can be found in the first byte provided in response to an Inquiry Command
SCSI Inquiry Command
The SCSI Inquiry command is used to obtain basic information from a target device. The CDB structure is:If the EVPD parameter bit is zero and the Page Code parameter byte is zero then the target will return the standard inquiry data, which is structured as follows:The special fields in the...
. The currently defined 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 - CD/DVD-ROM 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