This tutorial will take you through the steps involved in installing both internal and external SCSI devices – specifically a CD-ReWriter and scanner – covering each of the following:

installing the host adapter
configuring the devices
mounting the internal drive
making the connections
installing the associated software.

As with most specifications in the computer world, the original SCSI (pronounced scuzzy) specification was completed (in 1986) after work had already begun on a better version (SCSI-2). It was developed as a result of attempts by Shugart and NCR to develop a new interface for minicomputers. The basis of the interface was, and still is, the set of commands that control data transfer and communication among devices. The commands were the strength of SCSI, because they made the interface intelligent; but they were also its initial weakness, as there wasn’t enough of a standard for the command set to be truly useful to device manufacturers. Consequently, in the mid-1980s, the Common Command Set (CCS) extension was developed to standardise SCSI commands.

The Microsoft iSCSI Software Target provides storage (disks) over a TCP/IP network. It turns a computer running Windows Server into a storage device which provides shared block storage. Package Contents: AHA-2940 UW PCI-to-Wide UltraSCSI host adapter board Adaptec 7800 Family Manager Set software drivers for Windows NT, Windows 95, OS/2 2.x and 3.x, Netware 3.x and 4.x, SCO Unix 3.2.x and Unixware 1.x and 2.x Adaptec EZ-SCSI software for Windows NT, Windows 95, Windows for Workgroups, and DOS Includes applications such as: SCSI Tape Backup (Backup Basics), QuickScan, CD.

The SCSI interface is a shared-bus configuration that supports a wide variety of peripherals, including HDDs, tape drives, optical drives, scanners, printers, and redundant arrays of independent disks (RAID) subsystems. The SCSI bus operates independently of the system CPU and the system bus through an integrated or plug-in host bus adapter (HBA).

The actual controllers are built into each SCSI device. They “chain” SCSI peripherals to the SCSI bus via the host adapter. Each device on the chain, including the host, must be identified by a unique ID number. One SCSI device must not use the same ID number as another, but they may be numbered non-sequentially. Most SCSI host adapters feature external and internal connectors, with the option for the chain to extend in either or both directions. There’s no relationship between the IDs and the physical position on the bus, but both ends must be electrically “terminated” with resistors to prevent signal reflections and guarantee data integrity over long cable lengths. Termination comes in several varieties, from physical jumpers or plugs to software configurations.

The SCSI-1 standard allows for 8 devices to be connected to a single SCSI cable on a narrow bus configuration (8 data lines); SCSI-2 increases support to 16 devices on a wide bus configuration (16 data lines). New SCSI interfaces are backward compatible with most previous SCSI interfaces. SCSI devices of differing transfer speeds can coexist on the same SCSI bus. To guarantee compatibility and data reliability, transfer rates are negotiated between devices before data transfer is initiated

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Starting with Windows 10, Version 2004 (OS build 19041.488 or higher), two additional identifiers are available for NVMe storage disk drives which support the STOR_RICH_DEVICE_DESCRIPTION structure:

SCSIt*v(8)p(40)

Where:

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t* is a device type code of variable length
v(8) is an 8-character vendor identifier
p(40) is a 40-character product identifier

SCSIt*v(8)p(40)r(8)

Where:

t* is a device type code of variable length
v(8) is an 8-character vendor identifier
p(40) is a 40-character product identifier
r(8) is an 8-character revision level value

In versions of Windows prior to Windows 10, Version 2004 (OS build 19041.488 or higher), the device ID format for a small computer system interface (SCSI) device is as follows:

SCSIt*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
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Sec driver download for windows. 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 code	Device type	Generic type	Peripheral 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:

SCSIDiskSEAGATE_ST39102LW_______0004

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

SCSIt*v(8)p(16)

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SCSIt*v(8)

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SCSIv(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 t

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