unix, PCs and SCSI

neese at adaptex.UUCP neese at adaptex.UUCP
Fri Nov 17 07:32:00 AEST 1989

>>>Will it be cheaper?
>>My philosophy on the cost factor:  If cost is your primary concern, then
>>SCSI is a poor choice. 
>I have to disagree with this.  If you are planning on adding a tape drive,
>SCSI will probably be cheaper than going with a RLL or ESDI drive
>and controller and tape drive and proprietary controller.  When I
>went shopping, the archive 150 meg tape was 900 for the SCSI, and 1800
>for the proprietary controller version.  Plus, the SCSI method saves you
>an IRQ *and* slot that the tape controller would normally take up
>(and that is a *big* consideration on a AT bus).  All in all a clear
>win.  Plus I can reuse the hardware if I go to another platform (Suns
>150 meg tapes are just archives), etc.  Go with SCSI, you won't
>regret it.

I probably should have elaborated on this.  If you are looking at SCSI
for performance reasons then cost has to be a secondary consideration.
If you think a cheap SCSI solution is going to perform as well as a
good RLL solution, then you have made a mistake.
I agree, wholeheartily with your response.  There are other reasons to
look at SCSI than just performance, but I have gotten so much hate mail
about this topic that I have now started to take a hard line, when it
comes to the users idealistic meaning of what SCSI will bring him/her.

			Roy Neese
			Adaptec Central Field Applications Engineer
			UUCP @ {texbell,attctc}!cpe!adaptex!neese

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