# Easy SCSI question.

**URL:** <https://boards.straightdope.com/t/easy-scsi-question/260507>\
**Category:** Factual Questions\
**Created:** [August 19, 2004, 3:54am UTC](https://boards.straightdope.com/t/easy-scsi-question/260507 "2004-08-19T03:54:59Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Nobody](https://avatars.discourse-cdn.com/v4/letter/n/94ad74/32.png) [@Nobody](https://boards.straightdope.com/u/Nobody)\
**Post date:** [August 19, 2004, 3:54am UTC](https://boards.straightdope.com/t/easy-scsi-question/260507/1 "2004-08-19T03:54:59Z")

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A quick and easy question about the old SCSI-2 cards and drives.

To connect a 50-pin SCSI controler to a 68-pin drive, all one would need would be either  
[SCSI 50-Pin F / 68-Pin M Adapter, HD50/HD68](http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=31494&item=6701232451&rd=1)  
Or  
[SCSI 50-Pin M/68-Pin F Adapter HD50 HD68](http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=31494&item=6701232933&rd=1)  
right?

Thanks.

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**Author:** ![LordVor](https://avatars.discourse-cdn.com/v4/letter/l/90ced4/32.png) [@LordVor](https://boards.straightdope.com/u/LordVor)\
**Post date:** [August 19, 2004, 5:16am UTC](https://boards.straightdope.com/t/easy-scsi-question/260507/2 "2004-08-19T05:16:52Z")

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Probably right. There are also “single ended” and “differential” scsi drives and controllers, you can’t plug a single ended drive into a differential controller and vica versa without an adapter that’s more expensive than the drive itself. ([explanation](http://www.ramelectronics.net/html/scsi_help.html#diff))

Also, you’re putting a narrow device on a wide bus, so you have to be sure that you’re terminating properly.

-lv