COMMUNICATION INTERFACE VERSUS COMMAND PROTOCOL

6

COMMUNICATION INTERFACE

AND COMMAND PROTOCOL

This chapter provides an overview of the communication interface and command protocol used by the VXA-320 (VXA-3) tape drive. It includes the following topics:

Communication interface versus command protocol

SCSI communication interface

SCSI interface requirements

SCSI command protocol

COMMUNICATION INTERFACE VERSUS COMMAND PROTOCOL

When a device is connected to a host computer, their interaction is accomplished via a communication interface (for example, a parallel SCSI bus). The communication interface is comprised of the physical interface (for example, cables, connectors, and control circuitry) and the signaling protocol used during communication.

The physical interface determines the number of devices that can be attached to a bus or network loop, the maximum length of the cables, and the physical characteristics of the cable itself (for example, the number of wires, shielding, and so forth). The signaling protocol defines the electrical characteristics and timing of signals carried by the cable, the message system requirements, transmission speeds and maximum data transfer rates, as well as the encoding and decoding of the individual bit patterns representing commands passing between the individual devices.

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Tandberg Data VXA-320 (VXA-3) Communication Interface Command Protocol, Communication Interface Versus Command Protocol

VXA-320 (VXA-3) specifications

Tandberg Data VXA-320 (VXA-3) is a sophisticated backup solution designed for businesses seeking reliable data storage and backup capabilities. It is part of the renowned VXA series, heralded for its innovative approach to data archiving and its robust performance in diverse operating environments.

One of the standout features of the VXA-320 is its impressive data transfer rate, which reaches up to 36 GB per hour. This capability significantly enhances backup speed, making it a suitable choice for organizations with extensive data storage needs. The device supports a native capacity of 160 GB per cartridge, which can be expanded to 320 GB when data is compressed. This dual-layer cartridge system ensures that users can efficiently manage large volumes of data without constantly needing to interchange tapes.

The VXA-320 employs the unique VXA tape format, characterized by its advanced error correction and data integrity features. This format minimizes data loss risks and ensures reliable restoration of information. Additionally, the VXA-3 incorporates a one-inch data path, allowing it to handle higher track counts and thereby achieve better storage density. This design improves the efficiency of data retrieval and archiving processes.

Another significant aspect of the VXA-320 is its compatibility with a myriad of operating systems and backup applications, making it a versatile addition to various IT infrastructures. Businesses can integrate the VXA-3 into existing systems without the need for extensive reconfiguration. This flexibility enhances its appeal to organizations looking for a straightforward backup solution.

The device also includes an intelligent tape management system that tracks the status of backup jobs and the usage of tapes. This feature facilitates easier management of the backup process and ensures users remain informed about the condition of their storage media.

Tandberg Data offers extensive support documentation and tools that facilitate straightforward operation of the VXA-320. Combined with reliable performance and innovative storage technologies, the VXA-320 (VXA-3) stands out as a robust solution for data protection needs. Overall, it represents an effective investment for businesses seeking dependable data backup and archiving solutions.