The jumper is just a wire that bridges the two pins on either side, so you can make your own from some small copper wire or the like. For that matter, you could even risk bending the pins so they touch -- though that is not recommended! There may actually be a "proper" jumper on the old drive -- or use one from the Master/Slave jumpers of an ATA unit, as one of these will probably fit.
If the Connor drive has the pins described (marked TE or the like for termination), then there must be a jumper installed to terminate the scsi chain (your drive is at one end of the chain), or the machine will not boot/ will work very temporarily and erratically at best. What you describe in terms of symptoms is consistent with improper termination (among other things), so ensuring proper termination is the place to begin. If that doesn't work, then you may have other issues.
Use of a multi-gigayte drive in a 68030 Mac is unnecessary, in my view, as there is scarcely enough software in existence to fill one up. Use of most such drives also generates other problems, related to incompatible drivers, the problem of maximum partition size with the software you are likely to be running on a IIvx, etc., but yes, what you describe can indeed be made to work with knowledge and effort.
As it happens, however, you have a 160MB drive which may well work, and 160MBs would be plenty for playing around with the thing. So begin there. Scsi is a fussy system to work with as a beginner, but once you get it set up right, it will be trouble-free.
If the Connor drive has the pins described (marked TE or the like for termination), then there must be a jumper installed to terminate the scsi chain (your drive is at one end of the chain), or the machine will not boot/ will work very temporarily and erratically at best. What you describe in terms of symptoms is consistent with improper termination (among other things), so ensuring proper termination is the place to begin. If that doesn't work, then you may have other issues.
Use of a multi-gigayte drive in a 68030 Mac is unnecessary, in my view, as there is scarcely enough software in existence to fill one up. Use of most such drives also generates other problems, related to incompatible drivers, the problem of maximum partition size with the software you are likely to be running on a IIvx, etc., but yes, what you describe can indeed be made to work with knowledge and effort.
As it happens, however, you have a 160MB drive which may well work, and 160MBs would be plenty for playing around with the thing. So begin there. Scsi is a fussy system to work with as a beginner, but once you get it set up right, it will be trouble-free.