Seagate Ultra160 Product Manual page 169

SCSI Interface Product Manual, Rev. B
[1] The PERIPHERAL QUALIFIER and PERIPHERAL DEVICE TYPE fields identify the device currently con-
nected to the logical unit. If the target is not capable of supporting a device on this logical unit, the device
server shall set this field to 7Fh (PERIPHERAL QUALIFIER set to 011b and PERIPHERAL DEVICE
TYPE set to 1Fh). The PERIPHERAL QUALIFIER is defined in Table 80 and the peripheral device type is
defined in Table 81.
Table 80: Peripheral qualifier
Qualifier Description
000b The specified peripheral device type is currently connected to this logical unit. If the device server is
unable to determine whether or not a physical device is currently connected, it also shall use this periph-
eral qualifier when returning the INQUIRY data. This peripheral qualifier does not mean that the device is
ready for access by the initiator.
001b The device server is capable of supporting the specified peripheral device type on this logical unit. How-
ever, the physical device is not currently connected to this logical unit.
010b Reserved.
011b The 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 provide compatibility with previous versions of
SCSI. All other peripheral device type values are reserved for this peripheral qualifier.
1XXb Vendor-specific.
Table 81: Peripheral device type
Code Doc. Description
00h SBC Direct access device (e.g., magnetic disc)
01h SSC Sequential access device
02h SSC Printer device
03h SPC Processor device
04h SBC Write-once device
05h MMC CD-ROM device
06h SCSI-2 Scanner device
07h SBC Optical memory device
08h SMC Medium changer device
09h SCSI-2 Communications device
0Ah-0Bh Defined by ASC ITS (Graphic arts pre-press device)
0Ch SCC-2 Storage array controller device
0Dh SES Enclosure services device
0Eh RBC Simplified direct access device
0Fh OCRW Optical card reader/writer device
10h Reserved
11h-1Eh Reserved
1Fh Unknown or no device type
[2] RMB. A removable medium bit of zero indicates that the medium is not removable. A RMB bit of one indi-
cates that the medium is removable.
[3] The ANSI-APPROVED VERSION field indicates the implemented version of this manual and is defined
below in Table 82.
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