What is SCSI (Small Computer System Interface)?

What is SCSI (Small Computer System Interface)?

• A. A set of ANSI standard electronic interfaces that allow personal computers to communicate with peripheral hardware such as disk drives, tape drives, CD-ROM drives, printers, and scanners
• B. A plug-and-play interface, which allows a device to be added without an adapter card and without rebooting the computer
• C. A standard electronic interface used between a computer motherboard's data paths or bus and the computer's disk storage devices
• D. A point-to-point serial bi-directional interface for transmitting data between computer devices at data rates of up to 4 Gbps

Answer: (A)

SCSI is a family of ANSI-standard interfaces that lets a computer communicate with peripheral devices. It defines how devices attach to a SCSI bus through a host adapter, how each device is addressed, and how commands and data are transferred. This setup is capable of connecting multiple devices—such as disk drives, tape drives, CD/DVD drives, printers, and scanners—on a shared bus, often with daisy-chaining. This broader, bus-based approach distinguishes SCSI from more modern point-to-point interfaces like SATA, which connect one device directly to the motherboard. It also means SCSI isn’t simply plug-and-play without any adapter; you need a host bus adapter (HBA) and proper configuration to manage multiple devices on the same bus. While SCSI has evolved from parallel to serial forms in later years (e.g., Serial Attached SCSI), the key idea is a standardized way for a computer to talk to various peripherals over a common interface.

SCSI is a family of ANSI-standard interfaces that lets a computer communicate with peripheral devices. It defines how devices attach to a SCSI bus through a host adapter, how each device is addressed, and how commands and data are transferred. This setup is capable of connecting multiple devices—such as disk drives, tape drives, CD/DVD drives, printers, and scanners—on a shared bus, often with daisy-chaining.

This broader, bus-based approach distinguishes SCSI from more modern point-to-point interfaces like SATA, which connect one device directly to the motherboard. It also means SCSI isn’t simply plug-and-play without any adapter; you need a host bus adapter (HBA) and proper configuration to manage multiple devices on the same bus. While SCSI has evolved from parallel to serial forms in later years (e.g., Serial Attached SCSI), the key idea is a standardized way for a computer to talk to various peripherals over a common interface.