DNS-3200 User’s Manual 78
Chapter 7 System Maintenance

7.1 System Protection & Repairs

DNS-3200 features a large number of advanced technologies for the pro-
tection of the system and data, assuring that failure and system down time
is minimized. In this chapter, we are giving detailed information about the
protection provided for the system and data.
When DNS-3200 is released from the factory, the operating system split
area comes in RAID 1N mode, where 10GB of the hard disc becomes a
logical disk for the split of the operating system. When the user completes
system setup, the mirror split is RAID 1N consisting of 4 hard disks in
two RAID 1 arrays (mirrors), one as a disk split area for the primary oper-
ating system and the other as a split area for the hidden backup operating
system (not accessible). When the primary operating system is unable to
turn the system on because of an unstable program, virus infection or
human factors, the system can then be switched to the backup operating
system mirror to turn the system on for service. The following figure
shows the configuration of disks split by RAID 1N.
logical disk 2
Backup operating system disk
logical disk 1
Primary operating system disk
Data split area