Identifiers for SCSI Devices

The device ID format for a small computer system interface (SCSI) device is as follows:

SCSI\t*v(8)p(16)r(4)

Where:

  • t* is a device type code of variable length.

  • v(8) is an 8-character vendor identifier.

  • p(16) is a 16-character product identifier.

  • r(4) is a 4-character revision level value.

The bus enumerator determines the device type by indexing an internal string table, using a numerically encoded SCSI device type code, obtained by querying the device, as shown in the following table. The remaining components are just strings returned by the device, but with special characters (including space, comma, and any nonprinting graphic) replaced with an underscore.

The SCSI Port driver currently returns the following device type strings, the first nine of which correspond to standard SCSI type codes.

SCSI Type CodeDevice TypeGeneric TypePeripheral ID

DIRECT_ACCESS_DEVICE (0)

Disk

GenDisk

DiskPeripheral

SEQUENTIAL_ACCESS_DEVICE (1)

Sequential

TapePeripheral

PRINTER_DEVICE (2)

Printer

GenPrinter

PrinterPeripheral

PROCESSOR_DEVICE (3)

Processor

OtherPeripheral

WRITE_ONCE_READ_MULTIPLE_DEVICE (4)

Worm

GenWorm

WormPeripheral

READ_ONLY_DIRECT_ACCESS_DEVICE (5)

CdRom

GenCdRom

CdRomPeripheral

SCANNER_DEVICE (6)

Scanner

GenScanner

ScannerPeripheral

OPTICAL_DEVICE (7)

Optical

GenOptical

OpticalDiskPeripheral

MEDIUM_CHANGER (8)

Changer

ScsiChanger

MediumChangerPeripheral

COMMUNICATION_DEVICE (9)

Net

ScsiNet

CommunicationsPeripheral

10

ASCIT8

ScsiASCIT8

ASCPrePressGraphicsPeripheral

11

ASCIT8

ScsiASCIT8

ASCPrePressGraphicsPeripheral

12

Array

ScsiArray

ArrayPeripheral

13

Enclosure

ScsiEnclosure

EnclosurePeripheral

14

RBC

ScsiRBC

RBCPeripheral

15

CardReader

ScsiCardReader

CardReaderPeripheral

16

Bridge

ScsiBridge

BridgePeripheral

17

Other

ScsiOther

OtherPeripheral

 

An example of a device ID for a disk drive would be as follows:

SCSI\DiskSEAGATE_ST39102LW_______0004

There are four hardware IDs in addition to the device ID:

SCSI\t*v(8)p(16)

SCSI\t*v(8)

SCSI\v(8)p(16)r(1)

V(8)p(16)r(1)

In the third and fourth of these additional identifiers, r(1) represents just the first character of the revision identifier. These hardware IDs are illustrated by the following examples:

SCSI\DiskSEAGATE_ST39102LW_______

SCSI\DiskSEAGATE_

SCSI\DiskSEAGATE_ST39102LW_______0

SEAGATE_ST39102LW_______0

The SCSI Port driver supplies only one compatible ID, one of the variable-sized generic type codes from the previous table.

For example, the compatible ID for a disk drive is as follows:

GenDisk

The generic identifier is used in INF files for SCSI devices more than any other, because SCSI drivers are typically generic. Be aware that the SCSI Port driver returns no generic name at all for sequential access and "processor" devices.

 

 

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