Lenovo RD540 manual System fans Right rack handle

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

Figure 14. Components of server models with 3.5-inch hot-swap hard disk drives

	System fans		Right rack handle
1		11
	Twenty memory slots (installed memory modules		Hard-disk-drive bay 3
2		12
vary by model)
	PCI Express card		Optical drive bay (with an optical drive installed in some
3		13
		models)
	Cooling shroud		Hard-disk-drive bay 2
4		14
	Riser card assembly 1		Pull-out information card
5		15
	PCI Express card		Hard-disk-drive bay 1
6		16
	Riser card assembly 2		Intelligent Diagnostics Module
7		17
	Power supply		Hard-disk-drive bay 0
8		18
	Heat sinks (2)		Front panel
9		19
	Hot-swap hard-disk-drive backplane		Left rack handle
10		20

26ThinkServer RD540 User Guide and Hardware Maintenance Manual