Installation guide

Software Operation Manual
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the initial screen if it does not receive any command in 5 minutes.
To set or change the password, move the cursor to “Raid System Function”
screen; press the “Change Password” item. The “Enter New Password” screen
will appear. Do not use spaces when you enter the password, if spaces are used,
it will lock out the user. To disable the password, press only Enter key in both
the “Enter New Password” and “Re-Enter New Password” column. The existing
password will be cleared. No password checking will occur when entering the
main menu.
5.5.5.4 RAID/JBOD Function
JBOD is an acronym for “Just a Bunch of Disk”. A group of hard disks in a RAID
subsystem are not set up as any type of RAID configuration. All drives are
available to the operating system as an individual disk. JBOD does not provide
data redundancy. User needs to delete the RAID set, when you want to change
the option from the RAID to the JBOD function.
5.5.5.5 Background Task priority
The “Background Task Priority” is a relative indication of how much time the
controller devotes to a rebuild operation. The RAID subsystem allows the user
to choose the rebuild priority (Ultra Low, Low, Normal, High) to balance volume
set access and rebuild tasks appropriately.
5.5.5.6 SATA NCQ Support
The controller supports both SAS and SATA disk drives. The SATA NCQ 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. The RAID
subsystem allows the user to select the SATA NCQ support: “Enabled” or
“Disabled”.
5.5.5.7 HDD Read Ahead Cache
Allow Read Ahead (Default: Enabled)—When Enabled, the drive’s read ahead
cache algorithm is used, providing maximum performance under most
circumstances.