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