Apple Xserve Intel (Late 2006) - Manual (Page 26)

26 Chapter 2 Installing or Replacing Components
If there is a drive module already in the bay:
a Make sure the drive currently in the bay is not being used by any application or
being shared by the Xserve. (See the Mac OS X Server documentation for information
about shared volumes.)
b Unmount all volumes hosted by the drive using the Mac OS X Server command-line
tools or by dragging the volume icons to the Trash.
c Press the handle on the drive module so the handle pops out.
d Wait for the green, upper disk status light to go off. Then grasp the handle, pull the
drive module out of the bay, and set it aside.
Remove the blank
drive module from the bay.