Areca ARC-1882LP User Manual download pdf (Page 142)

WEB BROWSER-BASED CONFIGURATION

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• Max Command Length

Max Command Length is used to set a "best" IO size for the

RAID controller.

• 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 reli-

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

conguration: “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.

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Areca ARC-1882LP User Manual Page 142