IBM 390, 387, 393, 391, 389, 388, 441, 392 manual For more information about

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

Figure 11. Components of the server with five to eight 3.5-inch hot-swap hard disk drives

		DIT module (available in some models)		Hard disk drive bay 0
1			12
		Front panel		Front system fan 1
2			13
		Optical drive bay 2 (with an optical drive installed		Front system fan 2
3			14
in	some models)
		Optical drive bay 1 (with an optical drive installed)		System board battery
4			15
		Hard disk drive bay 7		Expansion card
5			16
		Hard disk drive bay 6		Heat sink and fan assembly
6			17
		Hard disk drive bay 5		System board
7			18
		Hard disk drive bay 4		Rear system fan
8			19
		Hard disk drive bay 3		Power supply
9			20
		Hard disk drive bay 2		Four memory slots (installed memory modules vary by
10			21
			model)
		Hard disk drive bay 1
11

• For more information about

1

to

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

Note: The DIT module 1 is only available in some models and the DIT panel also varies by model. See “DIT module” on page 18.

26ThinkServer User Guide