The C400 Specification and Installation : Removing a SATA Hard Drive from the CTERA C400
  
Removing a SATA Hard Drive from the CTERA C400
Note: If you want to remove a hard drive safely while the C400 is on, use the Safe Removal procedure described in Safely Removing Hard Drives.
To remove a SATA hard drive:
1 If the desired disk tray's Tray Open Button indicates that the disk tray is locked (that is, the groove is horizontal), then unlock the disk tray by using a flat-head screwdriver to turn the groove until it is vertical.
2 Press the disk tray's Tray Open Button.
The disk tray lever pops out.
3 Pull the lever outwards to remove the disk tray from the C400.
4 Flip over the disk tray, and remove the mounting screws from the disk tray.
5 Remove the hard drive from the disk tray.
6 Slide the disk tray back into the C400.
7 Press the disk tray lever back into place, until you hear a click.