EonNAS Pro 500 / 800 Hardware Manual
19
2.2.2 Drive Tray Numbering Sequence
EonNAS Pro 800
3
3
3
3
2
3
3
3
3
3
3
3
3
3
4
3
3
3
3
5
3
3
3
3
6
3
3
3
3
1
3
3
3
3
7
3
3
3
3
8
EonNAS Pro 500
3
3
3
3
2
3
3
3
3
3
3
3
3
3
4
3
3
3
3
5
3
3
3
3
1
Tray numbering sequence is important because if any faults occur to disk drives, you
should be able to identify the location of a faulty drive. Below is a list of the level of
fault tolerance for different RAID levels:
RAID
Level
Minimum disk
requirement
Max. No. of Failed Drives without Data Loss
0
2
No fault tolerance. 1 drive fails and the data is lost.
1
2
1 (mirrored pair)
5
3
1
6
4
2
Recognizing drive location is important. For example, if you mistakenly remove 2
drives from a RAID5 logical drive, data will be lost.
For detail RAID configuration methods using NAS Pro systems, please refer to the
Web Interface Manual.
