Areca 24/4 Internal/External Port Pcie 3.0 12 Gb/s SAS/SATA Raid Controller 2Gb Cache - Manual (Page 30)

HARDWARE INSTALLATION
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Pin Description Pin Description
SideBand0 SClock (Clock signal) SideBand1 SLoad (Last clock of a bit
stream)
SideBand2 Ground SideBand3 Ground
SideBand4 SDataOut (Serial data
output bit stream)
SideBand5 SDataIn (Serial data input bit
stream)
SideBand6 Reserved SideBand7 Reserved
Drive Locate: The location of a drive may be detected by sensing
the voltage level of one of the pre-charge pins before and after a
drive is installed.
The following signals define the SGPIO assignments for the Mini
SAS HD SFF-8643 in the 12Gb/s SAS RAID controller.
The Mini SAS HD SFF-8643 to 4xSATA with sideband cable follows
the SFF-8448 specification. The SFF-8448 sideband signals cable
is reserved for the backplane with header on it. The following
signal defines the sideband connector which can work with Areca
sideband cable on its Mini SAS HD SFF-8643 to 4xSATA cable.
The sideband header is located at backplane. For SGPIO to work
properly, please connect the 8-pin sideband cable to the sideband
header as shown above.
Step 9. Adding a FBM/BBM Backup Module (Optional)
Please refer to Appendix B and Appendix C of the user manual for
installing the flash-based/battery backup module (FBM/BBM) in
your 12Gb/s SAS RAID controller.
Step 10. Re-check Fault LED Cable Connections (Optional)
Be sure that the proper failed drive channel information is dis-
played by the fault LEDs. An improper connection will light the