116
U41621-J-Z156-1-76
Memory Cards
Hot-plug Components
©
c
o
gni
ta
s
. Ge
s
e
lls
c
h
ft
f
ü
r T
e
c
h
n
ik
-Do
k
u
m
ent
a
ti
o
n m
b
H
2
0
0
5
P
fad
: H
:\
G
S
\P
R
IM
E
R
G
Y
R
X
80
0 S
2
\B
A
\rx
8
00s
2u
s
.k
0
6
6.5.2
Memory Card Introduction
The server supports up to four memory cards. Each memory card holds up to
four DIMMs. There must be at least one memory card with one pair of DIMMs
installed for the server to operate.
There are two memory power buses split between the four memory cards.
Memory cards 1 and 2 are on power bus 1, and memory cards 3 and 4 are on
power bus 2. If memory mirroring is enabled, you can hot-replace one memory
card at a time on each memory power bus.
If a problem with a DIMM is detected, light path diagnostics will light the system-
error LED on the front of the server, indicating that there is a problem and guide
you to the memory card with the defective DIMM.
The following illustration shows the LEDs on the memory card:
Figure 27: Memory card LEDs
–
Memory Hot-Swap Enabled (1):
When this LED is lit, it indicates that hot-swap memory is enabled.
–
Error (2):
When this LED is lit, it indicates that a memory card or DIMM has failed.
–
Memory Port Power (3):
When this LED is off, it indicates that power is removed from the port and
that you can remove the memory card and replace a failed DIMM. This LED
will also turn off when the release levers are opened.
1
2 3