Fujitsu SPARC M10-4 Service Manual page 259

12.4.2 Removing an internal disk
Push the knob on the internal disk to unlock it and then raise the lever to a
45-degree angle.
Figure 12-2
Hold the lever and pull out the internal disk by about 3 cm (1.2 in.)
Note -
Chapter 12 Maintaining the Internal Disks 235