SCSI Primary Commands - 2.pdf

18 July 2001 T10/1236-D Revision 20The PERIPHERAL QUALIFIER and PERIPHERAL DEVICE TYPE fields identify the device currently connected to the logicalunit. If the target is not capable of supporting a device on this logical unit, the device server shall set this field to7Fh (PERIPHERAL QUALIFIER set to 011b and PERIPHERAL DEVICE TYPE set to 1Fh).The peripheral qualifier is defined in table 47 and the peripheral device type is defined in table 48.Table 47 — Peripheral qualifierQualifier000b001b010b011b1xxbDescriptionThe specified peripheral device type is currently connected to this logical unit. If thedevice server is unable to determine whether or not a physical device is currently connected,it also shall use this peripheral qualifier when returning the INQUIRY data.This peripheral qualifier does not mean that the device is ready for access by theinitiator.The device server is capable of supporting the specified peripheral device type on thislogical unit. However, the physical device is not currently connected to this logical unit.ReservedThe device server is not capable of supporting a physical device on this logical unit.For this peripheral qualifier the peripheral device type shall be set to 1Fh to providecompatibility with previous versions of SCSI. All other peripheral device type valuesare reserved for this peripheral qualifier.Vendor specificabTable 48 — Peripheral device type (part 1 of 2)Code Doc. a Description00h SBC Direct-access device (e.g., magnetic disk)01h SSC Sequential-access device (e.g., magnetic tape)02h SSC Printer device03h SPC-2 Processor device04h SBC Write-once device (e.g., some optical disks)05h MMC-2 CD-ROM device06h SCSI-2 Scanner device07h SBC Optical memory device (e.g., some optical disks)08h SMC Medium changer device (e.g., jukeboxes)09h SCSI-2 Communications device0Ah - 0BhDefined by ASC IT8 (Graphic arts pre-press devices)0Ch SCC-2 Storage array controller device (e.g., RAID)0Dh SES Enclosure services device0Eh RBC Simplified direct-access device (e.g., magnetic disk)0Fh OCRW Optical card reader/writer device10hReserved b11h OSD Object-based Storage DeviceAll standards are subject to revision, and parties to agreements based on thisstandard are encouraged to investigate the possibility of applying the most recenteditions of the listed standards.Type code 10h is reserved for use by Bridging Expanders.dpANS SCSI Primary Commands - 2 (SPC-2) 83