SCSI Question/Wide Ultra, 50 Pins?

[Johnny Ray]

SCompRacer-you remember correctly...I have the user's guide from my AHA-2940UW adapter. It clearly states that all three connectors should not be used on this adapter. It also says this at this page (last line on page) at Adaptec's site:

http://www.adaptec.com/support/confi...n/connect.html

I think the problem is that the adapter can not be properly terminated with all three in use.

Recall that so many people complained about not being able to use all three, the ability to use all four connectors of the 2940U2W became a major selling point:

http://www.adaptec.com/products/data...ha2940u2w.html

As far as harddrive upgrades go, even I was surprised at the great performance boost my system got from my Atlas 10K/2940U2W combo. I had maxed out everything else and recently stuffed my pockets full of cash from some lucky stock sales and decided to treat myself. I'm glad I did.

John

------------------
PIII750 => 840 MHz
Asus P3B-F (BIOS 1.04)
G400MAX(PowerDesk 5.52)
Win98
DirectX 7.0A
384 MB CAS 2 PC133 memory
Aureal SQ 2500 (Vortex2, 2048 drivers)
Klipsch Promedia V2.400 speakers
Adaptec AHA-2940U2W Quantum 9/1 GB Atlas 10K
Plextor UtraPlex Wide Plexwriter 8/20 CDR
the last ISA modem

[Brian R.]

I don't know if it matters, but I don't have a terminator on the Syquest drive...

[SCompRacer]

Thanks Johnny Ray! Thought I had a brain fade, but it appears not.

I like the performance I get as well. Came in handy when I helped someone close to me with an at home accounting business until they could afford a better PC.

Gee Brian R., can't explain your situation about the Syquest not being terminated, but it defies everything I learned about SCSI. But it works and thats all that matters.

[Brian R.]

Ain't ignorance bliss... If I knew about the problem, I wouldn't have been able to get it to work.

By the way, it won't work if I terminate the Syquest with a passive terminator. Also, the SCSI card is an OEM 2940 unit from Dell. Maybe it's set up a little different from the one from Adaptec.

[This message has been edited by Brian R. (edited 08 June 2000).]

[Guyver]

Uhmmm...

I would stay away from a "50-pin" "wide" scsi device. Unless you can see it work, and possibly get a bench out of it, you aren't going to be any faster than an Ultra Narrow. To my knowledge the 50-pin spec only supports 8-bit *hence narrow* scsi. It might be ultra, but I don't think it's wide. There were some mis-labeled drives a while back, and that may be one of them.

It's just like ultra-160m, you really need the extra, double-lead cables to do it right, but a standard 68pin will do in a pinch.

BTW - Ultra160/M rules....

Guyver