Acer Altos R520 manual Mid-plane board, Active mid-plane board SAS model

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Mid-plane board

The mid-plane boad serves as the primary interface between the mainboard, backplane, and control panel. It is used to determine the desired hard drive interface for the system. There are two mid-planes available for this system: an active mid-plane board and a passive mid- plane board.

Active mid-plane board (SAS model)

The active mid-plane board is used to provide SAS support. It has an integrated LSI 1068 SAS controller that provides support for up to eight hot-plug SAS HDDs. By default, the active mid-plane provides software RAID levels 0, 1, and 10. With the installation of an optional RAID activation key and RAID cache, the mid-plane can support hardware RAID levels 0, 1, 5, 6, 10, and 50.

Note: Mid-plane will support RAID level 6 when available.

	B	C
	A
			D
			E
				F
		K
		J I
				G
				H
Item	Description		Item	Description
A	Fan 2 power connector		G	RAID BBU (battery backup
				unit) connector
B	Fan 1 power connector		H	Mid-plane power connector
C	RAID activation key		I	Thumbscrew
	connector
D	Bridge board connector		J	Fan 4 power connector