Although the SCSI (Small Computer Systems Interface) bus system offers greater flexibility, it's also much more expensive. SCSI is only used for workstations and servers. Ultra2 or Ultra 160 SCSIs are typical standards. A SCSI ribbon cable has 68 pins. All SCSI standards have one thing in common: you can run at least seven drives on one adapter. "Wide" models even allow 14 devices to be operated.
It is important to know how it works. SCSI is an open bus system and allows cable lengths of well over a meter. However, the bus must be closed with a terminal resistor at each end, so that the signals don't reflect. Termination can mostly be activated by a jumper on the last device. LVD cables have their terminator as a plug-on module. The position of the individual devices on the SCSI cable, by the way, is up to you. The drives are distinguished by way of so-called SCSI Ids that run from 0 to 7 or 0 to 15. ID7 is usually the host adapter, 0 or 1 is usually used for the hard drive(s). The rest of the configuration is up to you. Jumpers are used to define the ID address from 0 to 7. In the following example, the manufacturer has named its SCSI address IDs DAS0 to DAS3.

Description of the SCSI jumper block for auxiliary connectors. DAS0 to DAS3 are the SCSI address bits.

Jumper table for setting addresses.

Connector blocks on an SCSI hard drive: power supply, jumper blocks (auxiliary connector), SCSI ribbon cable (from left to right).
In this example, termination can be activated by bridging pins 9 and 10. This is called "Enable SE SCSI Terminator" in the picture.
- Building A PC System
- Standard Components Of A PC System
- Standard Components Of A PC System, Continued
- Case And Power Supply
- Cases: More Questions For The Salesman
- This And That: Screws, Spacers & Jumpers
- Motherboard Overview
- Basic Motherboard Configuration
- Setting The Clock Speed
- Connecting The Floppy Drives
- Connecting Hard Drives And CD-ROM/DVD
- SCSI Drives - The Exception
- Safety Notice: The Destructive Potential Of Electrostatic
Create a new thread in the Reviews comments forum about this subject
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1 HideAnonymous , September 20, 2008 7:55 PMthanks,i hope my mum approves of my £700+ setup that i want lol
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1 HideMarco925 , May 6, 2010 3:44 PMSo Different compared to today's build it yourself article
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0 HideAnonymous , December 13, 2010 5:36 PMy is this so hard
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0 HideAnonymous , December 13, 2010 5:38 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0 HideAnonymous , December 13, 2010 5:43 PMThis is is so similar compared to today's build it yourself article
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0 HideAnonymous , March 31, 2011 7:45 AMThis is a pretty in depth guide on how to build a computer. I found How to Build a Computer pretty useful too.
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0 HideAnonymous , March 31, 2011 7:46 AMHow to Build a Computer is a pretty good guide too.
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0 HideAnonymous , August 11, 2011 12:57 AMMy son and his friend bought the components for a gaming pc. They had XP to put on the computer but it wont load. It has Linux on it. I don't know much about this sort of thing but could it be bc the XP is already been loaded on another computer? If I can find one of our op systems software that has an extra load on it will it load on the gaming pc with no problems? Just want to be sure in case I have to drop the money for the operating system.
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0 Hidejoeman99 , January 30, 2012 7:05 AMI always use this manual when building PCs, I never touch or buy any computer without it http://howtofixstuff.blogspot.com/2012/01/how-to-build-computer.html