Areca ARC-1222 - Internal Min SAS 4 I to Internal Min SAS 4 I Cable; LED Cables

HARDWARE INSTALLATION
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Figure 2-7, Min SAS 4i to Min SAS 4i Cable
2.4.3 Internal Min SAS 4i to Internal Min SAS 4i
cable
The SAS RAID controllers have 1-6 Min SAS 4i internal connec-
tors, each of them can support up to four SAS/SATA signals.
These adapters can be installed in a server RAID enclosure with
Min SAS 4i internal connectors backplane. This Min SAS 4i cable
has eight signal pins to support four SAS/SATA drives and six pins
for the SGPIO (Serial General Purpose Input/ Output) side-band
signals. The SGPIO bus is used for efcient LED management and
for sensing drive Locate status.
2.5 LED Cables
There is no SGPIO supported in the most of old version SATA
backplane. The SAS controller also provides two kinds of alterna-
tive LED cable header to support the fault/activity status for those
backplanes. The Global Indicator Connector is used by the server
global indicator LED.
The following electronics schematic is the SAS RAID controller logi-
cal of fault/activity header. The signal for each pin is cathode (-)
side.