It's a shame there's no more Amiga user's groups around, anymore. Am 100% confident that someone with more experience in SCSI could get your A2091 working perfectly in no time. But if you have money for an IDE solution, go for it. IDE is certainly (comparably) easier than SCSI.
@danbeaver - I love your comments lately. 
Hi I do thank you for all the help but I must have set every setting I can and I have checked and checked and looked at your pics which have the identical settings as the pics shown I have looked on the net and booted up with just the hard drive and changed the jumper setting and no joy,
so I will try another direction which might not be the right one ,but a Buddha and a TrueIDE device is my next step ,very best wishes Brian. ps there are 3.1 roms fitted