Epson EQUITY 3865X/20 PLUS - Manual (Page 151)

If one of your hard disk drives is already installed in the
computer, follow the steps under “Removing a Hard Disk From
the Vertical Position,, on page 7-21 to remove it. Then set the
jumpers on both drives while they are out of the computer.
Note
If you are removing one hard disk drive and leaving one in
your computer, be sure to set the jumpers on the remaining
drive to indicate that you have only one hard disk drive.
See the table above for the correct jumper settings. Then
follow the instructions under ‘Removing a Hard Disk From
the Vertical Position,, on page 7-21 so you can access the
jumpers on the drive.
Installing a Hard Disk in the Vertical Position
Follow the instructions in this section to install (or reinstall) a
hard disk drive in the vertical mounting position. You may need
to perform the following procedures:
Removing the mounting frames from a new hard disk drive
Removing the mounting plate from the computer and
connecting it to the drive
Installing the drive
Attaching the drive cable to the bottom of the subassembly.
If you are installing a new drive in the vertical mounting
position, follow all of the steps in this section. If you are
reinstalling a drive that you previously removed from this
position, see “Installing the Drive” on page 7-12.
Installing and Removing Disk Drives 7-7