User`s manual

D-4
SC836 Chassis Manual
#3. MG9072 Chip
The MG9072 is an enclosure management
chip that supports the SES-2 controller and
SES-2 protocols.
SAS Activity LED Header
Pin Denitions (JP26)
Pin # Denition Pin # Denition
1 ACT IN#0 6 ACT IN#4
2 ACT IN#1 7 ACT IN#5
3 ACT IN#2 8 ACT IN#6
4 ACT IN#3 9 ACT IN#7
5 Ground 10 Empty
D-5 Front Connector and Pin Denitions
#1. Activity LED Header
The activity LED headers, designated JP26
and JP47, are used to indicate the activity
status of each SAS drive. These activity LED
headers are used by the host controller for
the SATA drives that previously had no activ-
ity status output. If using a SAS drive, and
for most SATA drives, these activity headers
are not required.The Activity LED Header is
located on the front panel. For the Activity
LED Header to work properly, connect using a
10-pin LED cable.
#2. CD-ROM/Floppy 4-Pin Connectors
The 4-pin connectors, designated JP105 and
JP106, provide power to the CD-ROM and
oppy drives. See the table on the right for
pin denitions.
CD-ROM/
FDD Power
4-Pin Connector
(JP105 and JP106)
Pin# Denition
1 +5V
2 and 3 Ground
4 +12V
SAS Activity LED Header
Pin Denitions (JP47)
Pin # Denition Pin # Denition
1 ACT IN#8 6 ACT IN#12
2 ACT IN#9 7 ACT IN#13
3 ACT IN#10 8 ACT IN#14
4 ACT IN#11 9 ACT IN#15
5 Ground 10 Empty