IBM 393, 387, 391, 389, 388, 441, 390, 392 manual

Note: The number of the installed hard disk drives varies by model. For the vacant drive bay, there is a dummy hard disk drive tray to cover the place.

•For information about the supported expansion card, see “System board components” on page 42.

•Depending on the model, your server might come with a screw-secured, non-hot-swap power supply or hot-swap redundant power supply module(s).

•For more information about the memory modules, see “Memory module installation rules” on page 90.

The following illustration shows the components of the server with up to four 3.5-inch hot-swap hard disk drives.

Figure 13. Components of the server with up to four 3.5-inch hot-swap hard disk drives

		DIT module (available in some models)		Front system fan 1
	1		9
		Front panel		System board battery
	2		10
		Optical drive bay 2 (with an optical drive installed		Expansion card (varies by model)
	3		11
in		some models)
		Optical drive bay 1 (with an optical drive installed)		Heat sink and fan assembly
	4		12
		Hard disk drive bay 3		System board
	5		13
		Hard disk drive bay 2		Rear system fan
	6		14
		Hard disk drive bay 1		Power supply
	7		15
		Hard disk drive bay 0		Four memory slots (installed memory modules vary by
	8		16
			model)

• For more information about

1

to

4 , see “Front view of the server” on page 15.

Chapter 3. Product overview 29