RA60 Disk Drive

RA60
Manufacturer:	Digital Equipment Corporation
Year Introduced:	1982
Drive Controller(s):	all SDI controllers
Capacity:	205 Mbytes (formatted)
Transfer Rate:	1.3 Mbytes/sec
Average Access Time:	50 msec
Revolutions per Minute:	3600 1/min
One Track Seek Time:	6.7 msec
Average Seek Time:	41.7 msec

An open RA60

It's a removable disk.

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: