Epson Endeavor Pro User Manual page 117

Install a drive in the rear internal drive bracket
Remove a drive from the rear internal drive bracket.
Some of the steps in this chapter may not apply for the drive
you are installing. See the documentation that came with your
drive for more information.
Your computer can hold up to seven mass storage devices, as
described in the table below.
To install or remove a drive, first remove the computer's cover
as described under "Removing the Cover" in Chapter 4. Then
remove any option cards that may be in your way. Once you
finish installing or removing drives, replace any option cards
you removed; see "Installing an Option Card"in Chapter 4 for
instructions.
6-2 Installing and Removing Drives in the Tower Computer