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 1 | logical disk 2 |
Primary operating system disk | Backup operating system disk |
Data split area