DATOptic RM12-S6.TB - Rackmount - Manual (Page 35)

WEB BROWSER-BASED CONFIGURATION
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and with all the rest of RAID members missing.
• Disk Capacity Truncation Mode
Areca RAID controller uses 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 control-
ler 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.
• Smart Option For HDD
This option is used to increase the reliability of SSDs/HDDs by
automatically copying data from a drive with potential to fail to
a designated hot spare or newly inserted drive. The options are:
“Failed The Drive”, “Failed The Drive If Hot Sapre Exist”, and
“Alert Only”. The default is “Alert Only”
“Failed The Drive” - controllers kill off the SMART fail drive im-
mediately.
“Failed The Drive If Hot Sapre Exist” – controllers kill off the
SMART fail disk if hot sapre dive is existed.
“Alert” – it will trigger alert when there happens a SMART fail
drive.