SOYO SY-KT400 Dragon Ultra User Manual page 140

This software can help users to auto-rebuild RAID 1 or RAID 0/1
array under the following 2 conditions.
1. A spare disk exists in the spare pool. When a source disk in a
RAID 1 array fails, a mirror disk will replace it automatically
and the spare disk will become the mirror disk. If a mirror disk
fails, the spare disk will auto-replace it to be the mirror disk.
2. When a disk is added to a RAID 1 or RAID 0/1 array and the
array resumes normal, the auto-rebuild function will be
started.
Add disks to broken arrays
If a RAID 1 or RAID 0/1 array is broken and there is an idle physical
disk, you can add it to the array. The system will auto-rebuild the
array at the same time.
You can use the above 3 features together. For example, insert a
hard disk, refresh the system, the software will prompt you to add the
disk to broken arrays. If you select one, the disk will be added to the
broken array and the rebuild procedure will auto-start in the
meantime.
135