DATOptic ARC-1680 Series - Manual (Page 138)

WEB BROWSER-BASED CONFIGURATION
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PHY will automatically enter the sleep mode. In this condition,
our firmware will set no linkage on those channels. Since some
HDDs have this behavior, our controller firmware will configure
the active channel CH5-8 on the external port. We added this
function for customer to set, if the controller automatically con-
figuration function detect the wrong direction of CH5-8 internal
channels. Please set the "SAS MUX SETTING" to "Internal" in the
setup manual then restart the system to set the active channel
CH5-8 on the internal port.
• 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 “Incomplete
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. The RAID
state will change to “Degraded Mode” while it powers on.
• Disk Write Cache Mode
User can set the “Disk Write Cache Mode” to Auto, Enabled, or
Disabled. “Enabled” increases speed, “Disabled” increases reli-
ability.
• Disk Capacity Truncation Mode
Areca RAID controllers use drive truncation so that drives from
differing vendors are more likely to be able to be used as spares
for each other. Drive truncation slightly decreases the usable
capacity of a drive that is used in redundant units.
The controller provides three truncation modes in the system
configuration: Multiples Of 10G, Multiples Of 1G, and Dis-
abled.
Multiples Of 10G: If you have 120 GB drives from different
vendors; chances are that the capacity varies slightly. For ex-
ample, one drive might be 123.5 GB, and the other 120 GB.
Multiples Of 10G truncates the number under tens. This makes
same capacity for both of these drives so that one could replace
the other.