User manual

WEB BROWSER-BASED CONFIGURATION
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Disk Capacity Truncation Mode
SATA RAID controller 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
conguration: “Multiples Of 10G”, “Multiples Of 1G”, and “No
Truncation”.
Multiples Of 10G: If you have 120 GB drives from different
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
the 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 the
same capacity for both of these drives so that one could replace
the other.
No Truncation: It does not truncate the capacity.