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JBOD/RAID Configuration
The RAID subsystem supports JBOD and RAID configuration.
SATA NCQ Support:
NCQ is a command protocol in Serial ATA that can only be implemented on native
Serial ATA hard drives. It allows multiple commands to be outstanding within a
drive at the same time. Drives that support NCQ have an internal queue where
outstanding commands can be dynamically rescheduled or re-ordered, along with
the necessary tracking mechanisms for outstanding and completed portions of
the workload. Disabled or Enable the SATA NCQ function.
HDD Read Ahead Cache:
This option allows the users to disable the cache of the HDDs on the RAID
subsystem. To some HDD models, disabling the cache in the HDD is neces-
sary to prove the RAID subsystem functions correctly.
HDD Queue Depth:
The queue depth is the number of I/O operations that can be run in parallel on
a device. This HDD Queue Depthe are 1, 2, 4, 8, 16, and 32.
Stagger Power On Control:
This option allows the power supplier to power up in order each HDD on the
RAID subsystem. In the past, all the HDDs on the RAID subsystem are pow-
ered up altogether at the same time. The power transfer time (lag time) from
the last HDD to the next one can be set within the range of 0.4 to 6.0.
HDD SMART status polling:
The SATA/SAS HDD has built the S.M.A.R.T. information in the disk. The con-
troller can read it through the SMART function. Click on RaidSet Hierarchy in
the main menu to view the information.
Disk Write Cache Mode:
The RAID subsystem supports auto, enabled and disabled. When the RAID sub-
system with BBM (battery backup module) the auto option will Enable disk write
cache. Contrariwise, the auto option will Disable disk write cache.
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Configuring
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