Areca 24/4 Internal/External Port Pcie 3.0 12 Gb/s SAS/SATA Raid Controller 2Gb Cache - Manual (Page 181)

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WEB BROWSER-BASED CONFIGURATION
• Empty HDD Slot LED
The firmware has added the "Empty HDD Slot LED" option to
setup the fault LED light "ON "or "OFF" when there is no HDD
installed. When each slot has a power LED for the HDD
installed identify, user can set this option to "OFF ". Choose
option "ON", the SAS RAID controller will light the fault LED; if
no HDD installed.
• CPU Fan Detection
The ARC-1883ix series incorporate one big passive heatsink
attaching a active cooling fan that allows the hot devices such
as a ROC and expander chip to keep cool. In addition, newer
systems already have enough air flow blowing over the con-
troller. If the systems have provided enough adequate cooling
for ROC and expander chip, user can remove the attaching fan
on the big passive heat sink.
The “CPU Fan Detection” function is available in the firmware
for detecting the cooling fan function on the ROC if you want
to use the active cooling fan on the ARC-1883i/x/LP low profile
board. When using the passive heatsink only on the controller,
disable the “CPU Fan Detection” function through this from
McBIOS RAID manager setting or Web Browser.
• SES2 Support
If your SAS backplane does not implement the correct SES2
function, you can disable the SES2 support on controller.
Controller will use SMP (only monitor PHY not environment)
to communicate with SAS backplane, but you will be not able
to monitor the backplane information.
• Max Command Length
Max Command Length is used to set a "best" IO size for the
RAID controller.
• Auto Activate Incomplete Raid
When some of the disk drives are removed in power off state
or boot up stage, the RAID set state will change to “Incom-
plete State”. But if a user wants to automatically continue to
work while the SAS RAID controller is powered on, the user
can set the “Auto Activate Incomplete Raid” option to enable.