Avago Technologies MegaRAID SAS 8204ELP - Manual (Page 47)

MegaRAID 1078-based SAS RAID Controller Family 3-3
Copyright © 2007 by LSI Corporation. All rights reserved.
Table 3.1 SAS 8708ELP RAID Controller – Jumpers and
Connectors
Jumper Type Description
J1 Cache Write Pending
LEDx 2-pin connector.
Connector for the enclosure LED. Provides
a signal that indicates when the on-board
cache contains data and a write from the
cache to the hard drives is pending.
Optional.
J2 On-board BIOS Enable 2-pin shielded header.
The optional BIOS function is enabled or
disabled in software depending on the
status of this jumper.
No jumper: BIOS is enabled (default).
Jumper: BIOS is disabled.
J3 Universal Asynchronous
Receiver/Transmitter
(UART) debugging 4-pin connector.
Reserved for LSI use.
J5 Individual Fault LED
header for eight ports 16-pin connector.
Indicates hard drive faults. There is one LED
per port. When lit, each LED indicates the
corresponding hard drive has failed or is in
the Unconfigured-Bad state. Refer to the
MegaRAID SAS Software User’s Guide for
more information about drive states.
Note: The LEDs function in a direct-attach
configuration (there are no SAS
expanders). Direct attach is defined as
a maximum of one hard drive con-
nected directly to each port. See
Figure 2.6 for an example.
J6 IPMI-style SMBus
(System Manage-
ment)/I
2
C header
3-pin shielded header.
Provides enclosure management support.
J7 Board-to-board connector
for battery backup unit
daughter card 20-pin connector.
Provides the interface to the daughter card
that contains the battery backup unit.