Small Computer System Interface (SCSI)
SCSI is a set of standards for physically connecting and transferring data between computers and peripheral devices. SCSI is most commonly used for hard disk drives and tape drives, but it can connect a wide range of other devices, including scanners and CD drives. SCSI interfaces provide for faster data transfer rates than most other storage technologies. They support Multiple Input/Output devices to be connected simultaneously to a single SCSI interface, allowing for daisy chaining of multiple devices. SCSI is available in several variants, including SCSI-1, SCSI-2, SCSI-3, and SCSI over Fibre Channel and SAS.
Guide on Small Computer System Interface (SCSI)
What is SCSI?
Small Computer System Interface (SCSI) is a standard communication protocol that allows computers to communicate with peripheral devices. It was commonly used in servers, mainframes, and supercomputers.
Why is it important?
SCSI was a leap forward in technology and laid the groundwork for many of the systems we use today. It was able to move data faster than the existing protocols and could connect several devices together.
How does SCSI work?
SCSI works by sending digital signals along a cable to another device. The sending device sets the SCSI ID number, which is then matched with the target device.
Exam Tips: Answering Questions on SCSI
To answer questions on SCSI, you should keep the following points in mind:
- Always explain what SCSI is and why it was so revolutionary.
- Describe the process of how SCSI works.
- Discuss the benefits of using SCSI.
- Use real-life examples of where SCSI might be used.
- Argue the points with evidence, and provides examples where necessary.
- Recap the important points to make sure they have been understood.
CompTIA A+ - Storage Devices and Interfaces Example Questions
Test your knowledge of Amazon Simple Storage Service (S3)
Question 1
You are trying to decide between using a SCSI and SATA interface for data storage. What advantage does the SCSI interface hold over SATA?
Question 2
You need to connect a new device to your computer's SCSI chain. What must you ensure to prevent conflicts and make the chain work properly?
Question 3
You are troubleshooting a server with SCSI devices and suspect a termination issue. What common symptom would indicate a termination problem?
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