User guide

LSI Corporation
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6Gb/s MegaRAID SAS RAID Controllers User Guide
August 2012
Chapter 3: MegaRAID SAS RAID Controller Characteristics
6Gb/s MegaRAID SAS RAID Controller Family
J4A5 LED Locate and Fault Indication header
Ports 16 to 19
Ports 20 to 23
2x8-pin header
Connects to an LED array that indicates whether a drive is in
a fault condition. There is one LED per port. When lit, each
LED indicates the corresponding drive has failed or is in the
Unconfigured-Bad state.
The LEDs function in a direct-attach configuration (there are
no SAS expanders). Direct-attach is defined as a maximum of
one drive connected directly to each port.
NOTE This header is used for RAID controllers with internal
SAS ports only.
J4B2 x4 SAS Ports 12 to 15 Internal connector SFF-8087 x4 internal mini SAS connector
Connects the controller by cable to SAS drives or
SATA 2 drives.
J5A1 x4 SAS Ports 16 to 19 Internal connector SFF-8087 x4 internal mini SAS connector
Connects the controller by cable to SAS drives or
SATA 2 drives.
J5A2 Write-Pending LED header 2-pin connector
Connects to an LED that indicates when the data in the
cache has yet to be written to the storage devices. Used
when the write-back feature is enabled.
J5B2 x4 SAS Ports 20 to 23 Internal connector SFF-8087 x4 internal mini SAS connector
Connects the controller by cable to SAS drives or
SATA 2 drives.
J5B3 Universal Asynchronous Receiver/Transmitter (UART)
debugging
4-pin connector
Reserved for LSI use.
Table 15 MegaRAID SAS 9280-24i4e RAID Controller – Connectors (Continued)
Jumper/
Connector
Type Description
J4A5
PORT 16
PORT 23
+ve-ve
ka
J5A2
ak
+ve -ve