DATOptic ARC-1680 Series - Manual (Page 136)

WEB BROWSER-BASED CONFIGURATION
136
• System Beeper Setting
The “System Beeper Setting” function is used to “Disabled” or
“Enabled” the SAS RAID controller alarm tone generator.
• Background Task Priority
The “Background Task Priority” is a relative indication of how
much time the controller devotes to a rebuild operation. The
SAS RAID controller allows the user to choose the rebuild pri-
ority (UltraLow, Low, Normal and High) to balance volume set
access and rebuild tasks appropriately. For high array perfor-
mance, specify a “Low” value.
• JBOD/RAID Configuration
JBOD is an acronym for “Just a Bunch Of Disk”. A group of
hard disks in a RAID box 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.
• 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 dynami-
cally rescheduled or re-ordered, along with the necessary
tracking mechanisms for outstanding and completed portions of
the workload. The SAS RAID controller allows the user to select
the SATA NCQ support: “Enabled” or “Disabled”.