wwwoooooowww there!!
get rid of that ibm drive and trade it in for another brand...
i once bought an ibm scsi drive and my A 4000 T didnt recognise it either... i did a google on its model number, and in one of the top 10 pages, was a forum in which an amiga user had the exact same brand of drive and he was running bsd... amigaos wont pick it up bsd... wont pick it up...
basically ibm scsi HDD's dont work with the amiga.... and i dont think its a software problem
it seems to me to be somthing that is unfixable

i still have that drive haning around doing nothing...