Figure 19: 3.5" Hard Disk Drive In Frame; Figure 20: 3.5" Drive Dummy - Fujitsu ETERNUS JX40 S2 Operating Manual

Hard Disk Drives

Figure 19: 3.5" hard disk drive in frame

Figure 20: 3.5" drive dummy

Free bays are provided with a drive dummy which must be removed before
fitting another hard disk drive.
I
Keep a drive dummy for future use. If you remove the hard disk drive
again and do not fit a replacement, you must put back the dummy drive
because of cooling.
ETERNUS JX40 S2
Removing/Installing Hard Disk Drive/Drive Dummy
Operating Manual 43