Areca 24/4 Internal/External Port Pcie 3.0 12 Gb/s SAS/SATA Raid Controller 2Gb Cache - Manual (Page 184)

WEB BROWSER-BASED CONFIGURATION
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• SES2 H/W Monitor
Events with E# are reported by that specific enclosure through
SES2 protocol. Raid controllers just forward these events. You
can use identify enclosure feature to find out which enclosure
is E#. After identify the enclosure, you can contact with the
enclosure vendor for the explanation of these errors. If these
events are fake events or you do not want to monitoring en-
closures, you can disable the SES2 H/W monitoring feature in
raid configuration menu.
• 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
“ Disabled’ .
Multiples Of 10G: If you have 120 GB drives from differ-
ent vendors; chances are that the capacity varies slightly. For
example, 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.
Multiples Of 1G: If you have 123 GB drives from different
vendors; chances are that the capacity varies slightly. For
example, one drive might be 123.5 GB, and the other 123.4
GB. Multiples Of 1G truncates the fractional part. This makes
capacity for both of these drives so that one could replace the
other.
Disabled: It does not truncate the capacity.