cramer@kontron.UUCP (Clayton Cramer) (05/21/86)
I know someone posted something on this subject quite recently -- but it has already aged off of our system. I have an IBM PC with an externally mounted 10 meg Tandon and a Western Digital 1002S-WXZ controller card. It appears that I can connect a second disk drive to this controller card. (There is a 34 pin connector labelled J1, and two 20 pin connectors labelled J2 and J3. J1 and J2 are used to connect to the Winchester I already have.) Does anyone know the details of how to do this? Is it necessary that both disk drives be of the same type and size? There is only one jumper on the card, and I presume this controls the number of disk drives. Any advice posted here would be of interest. Clayton E. Cramer
brown@nicmad.UUCP (05/23/86)
In article <804@kontron.UUCP> cramer@kontron.UUCP (Clayton Cramer) writes: >I know someone posted something on this subject quite recently -- but >it has already aged off of our system. > >I have an IBM PC with an externally mounted 10 meg Tandon and a Western >Digital 1002S-WXZ controller card. It appears that I can connect a >second disk drive to this controller card. (There is a 34 pin connector >labelled J1, and two 20 pin connectors labelled J2 and J3. J1 and J2 >are used to connect to the Winchester I already have.) Does anyone >know the details of how to do this? Yep! >Is it necessary that both disk drives be of the same type and size? >There is only one jumper on the card, and I presume this controls >the number of disk drives. The jumper on the card should control the size of the drive that the controller will see. You didn't say if the jumper was just one jumper or one jumper with a bunch of pins that could be jumpered with said jumper. (Did that make any sense?) The controller that I have has the three connectors for the drives and has a rocker switch bank. It is used to set the size of the attached drives. Since my XT is sealed at the moment (I am using it to do this response), I can't look at it and give you the exact model. But I am using two 10MB drives on it and will be changing to 20MB drives (as soon as they arrive). The 34 pin connector needs two of the 34 pin edge connectors on it. Basically you can take the cable you do have and just add another 34 pin connector to it, at the appropriate distance. Then you will need to make a new 20 pin cable. After the cables are made, you need to set the drives. One drive needs to be set to drive 0 and the other to drive 1. You should find a set of jumpers somewhere on the drive. As delivered from the manufacturer, they should already be set for drive 0. Change one of them to drive 1. Depending on the drive maker, the jumper numbering may start at 1, not 0. In that case, change one of the drives to drive 2. You will also need to remove the termination resister SIP from drive 0. When you connect the drives, the 34 pin connecter that is at the end of the cable needs to go to drive 1. This is done for termination reasons. The 20 pin connectors can plug into either J2 or J3, it makes no difference. Just for no real reason, I plug drive 0 into J2 and drive 1 into J3. That way if I need to unplug it, I know which cable went to which drive. After all of the above has been done, you are all set. Good Luck. -- ihnp4------\ harvard-\ \ Mr. Video seismo!uwvax!nicmad!brown topaz-/ / decvax------/