IBM 704 - Manual (Page 183)

Installing Internal Drives
Installing a 5.25-inch Removable-Media Drive
Before you begin:
Be sure you have:
Removed the server left side cover
Unlocked and opened the short bay door
Prepared the drive for installation (see “Preparing to Install
Options” on page 78 and “Preinstallation Steps (All Bays)”
on page 163).
Notes:
1. Installing hard disk drives in these bays is not recommended.
The hard disk drives generate EMI. In addition, a hard disk
drive in any of these bays is more susceptible to ESD.
2. System EMI integrity and cooling are both protected by having
drives installed in the bays or filler panels and EMI shields
covering the bays. When you install a drive, save the panel and
shield.
Chapter 4. Installing Options 165