RA60 Disk Drive
From Computer History Wiki
205 MB SDI HD, 1300 KB/s, 50 ms average access, 41.7 ms average seek, 6.7 track-to-track seek time, 3600 rpm
It's a removable disk too.
4.3 BSD disktab
ra60|RA60|DEC RA60 Removable:\ :ty=removable:ns#42:nt#4:nc#2382:\ :pa#15884:ba#8192:fa#1024:\ :pb#33440:pc#400176:\ :pg#82080:bg#4096:fg#512:\ :ph#268772:bh#4096:fh#1024: