Installation guide

Software Operation Manual
192
Max command Length
The "Max command Length" can set from 148K to 4M for performance fine tune.
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 6Gb/s 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 reliability.
Disk Capacity Truncation Mode
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 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.