Command Descriptor Block, Msb | Quantum Instruments DLT 7000

SCSI Commands

5.1.2 Command Descriptor Block

An initiator communicates with the drive by sending a 6- or 10-byte Command Descriptor Block that contains the parameters for the specific command. The SCSI command's operation code is always the first byte in the Command Descriptor Block and a control field is the last byte. For some commands, the Command Descriptor Block is accompanied by a list of parameters sent during the DATA OUT phase. Figure 5–1 shows the format of a typical 6-byte Command Descriptor Block. Table 5–2 contains a description of the Command Descriptor Block fields.

Bit	7		6	5	4			3		2	1	0
Byte
0						Operation Code

						(MSB)
1		Logical Unit Number							Logical Block Address
			(LUN)							(LBA)
										(LBA)
2 - 3							Logical Block Address
							(LBA)					(LSB)

Transfer Length, Parameter List Length, or Allocation Length

Control

NOTE: Unless otherwise specified, all reserved bits indicated in the commands are 0.

Figure 5–1 Typical Command Descriptor Block - Data Format

5-4	Quantum DLT 7000 Tape System

DLT 7000 specifications

The Quantum Instruments DLT 7000 is a state-of-the-art battery-powered light that brings advanced photography and videography offerings to professionals and enthusiasts alike. Renowned for its compact design, the DLT 7000 combines lightweight portability with powerful functionality. It is engineered to enhance the creative process by providing optimal lighting solutions in a variety of settings.

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Quantum Instruments DLT 7000 manual Command Descriptor Block, Msb, Lba Lsb

Models: DLT 7000

SCSI Commands

5.1.2 Command Descriptor Block

(MSB)

(LBA)

(LSB)

Figure 5–1 Typical Command Descriptor Block - Data Format

Quantum DLT 7000 Tape System

DLT 7000 specifications