It Mightr be a duff drive. If it is a 10,000 RPM SCSI Drive they usually run quite hot.
Can you give a Model # of the Drive I can help you Further.
Generally all IBM Manufactured SCSI Hard Drives run quite hot afer a little while and do not work on all Amiga SCSI Controllers, I've even had problems with then on PC Non Adaptec Controllers.
Cheers
Shaf
p.s. Some drives may have a 8-16 bit jumper, nust be set to 8 bit for SCSI I & II type controllers to work.