There are some SCSI drive that are pretty quiet (depending on your POV of course). Early GB drives, esp. 1,6" thick ones 1, 4 or 18 GB were a major pain.
What size would you be looking for? I can check what we've still got, e.g. 18 GB drives. AFAIR the multimedia drives (Seagate ...LCV) I had in use were very quiet for 7.2k drives.