Disk Capacity Truncation Mode; Advanced Configuration - Areca ARC-1880 Series User Manual

WEB BROWSER-BASED CONFIGURATION
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
"Disabled'.
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.
Multiples Of 1G: If you have 123 GB drives from different ven-
dors; 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.

6.8.2 Advanced Configuration

To set the RAID system function, move the cursor to the main
menu and click the "Advanced Configuration" link. The "Advanced
Configuration" menu will show all items, then select the desired
function.
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