Acer Network Device Altos R520 User's Manual | Page 25

Acer Network Card User's Manual - Network Device Altos R520.
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15

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.   

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 
connector

I

Thumbscrew

D

Bridge board connector

J

Fan 4 power connector

A

C

E

D

K

J

I

F

B

H

G

TP

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