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View Full Version : Anyone know the difference between these 2 32-bit Buslogic MCA SCSI cards?



Springbok
September 12th, 2013, 08:44 AM
I called, but the person did not know the difference.

This is a 32-bit MCA Buslogic BT-646 S/D model 1002023-06

http://www.ebay.com/itm/BusLogic-1002023-06-SCSI-Adapter-PCB-3435-Parts-/281058997600?pt=US_Server_Boards&hash=item41706bf560

This is a 32-bit MCA Buslogic BT-646 S/D model 1002023-05

http://www.ebay.com/itm/BusLogic-1002023-05-SCSI-Adapter-PCB-3435-Parts-/281058996335?pt=US_Server_Boards&hash=item41706bf06f


They look similar, but differ slightly. Was wondering if anyone knew what the difference is. I tried to google the info, but could not find any.

pearce_jj
September 12th, 2013, 09:21 AM
Isn't MCA as implemented in the PS/2 16-bit?

amadama
September 12th, 2013, 09:31 AM
I called, but the person did not know the difference.

This is a 32-bit MCA Buslogic BT-646 S/D model 1002023-06

http://www.ebay.com/itm/BusLogic-1002023-06-SCSI-Adapter-PCB-3435-Parts-/281058997600?pt=US_Server_Boards&hash=item41706bf560

This is a 32-bit MCA Buslogic BT-646 S/D model 1002023-05

http://www.ebay.com/itm/BusLogic-1002023-05-SCSI-Adapter-PCB-3435-Parts-/281058996335?pt=US_Server_Boards&hash=item41706bf06f


They look similar, but differ slightly. Was wondering if anyone knew what the difference is. I tried to google the info, but could not find any.

They are different revision levels for the board.

MCA came in both 16 and 32 bit.

Springbok
September 12th, 2013, 09:34 AM
They are different revision levels for the board.

MCA came in both 16 and 32 bit.

So would logic dictate that you get the newer revision, since later generally is better. I would assume the version 06 is the newer revision?

amadama
September 12th, 2013, 09:40 AM
Yes usually that is usually the case.

kyeakel
September 12th, 2013, 09:55 AM
It looks like from this site, that one may be a BT-646s and the other a BT-646d.

http://ohlandl.ipv7.net/SCSI/Buslogic_BT646.html

Kipp

dorkbert
September 12th, 2013, 12:09 PM
first board is differential (HVD). the second is single ended. differential is very uncommon; until LVD took hold, very few people uses differential (usually people that requires very very long cable runs.) HVD is not compatible with single ended or LVD. Don't plug an LVD or single ended drive into it, you'll fry something.

Springbok
September 12th, 2013, 12:25 PM
first board is differential (HVD). the second is single ended. differential is very uncommon; until LVD took hold, very few people uses differential (usually people that requires very very long cable runs.) HVD is not compatible with single ended or LVD. Don't plug an LVD or single ended drive into it, you'll fry something.

Ugh... I am assuming I need the single ended one. I ordered the variable ended. Called the seller and he is shipping me the single ended instead.

I.e. instead of getting this one

cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=281058997600

I got this one

http://www.ebay.com/itm/BusLogic-100...item41706bf06f

this is the drive I bought.....

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=221271216473

Out of curiosity... how would I know if this drive supported single or variable?

Springbok
September 12th, 2013, 12:27 PM
Ugh... I am assuming I need the single ended one. I ordered the variable ended. Called the seller and he is shipping me the single ended instead.

I.e. instead of getting this one

cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=281058997600

I got this one

http://www.ebay.com/itm/BusLogic-100...item41706bf06f

this is the drive I bought.....

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=221271216473

Out of curiosity... how would I know if this drive supported single or variable?

You just answered my question in the other thread. Thanks.

amadama
September 12th, 2013, 01:58 PM
My bad here, I didn't look hard enough.
Glad you got it sorted our with the seller!