N5200Pro Disk N/A problem

[Yohei]

Hi,

I got following alert email which described Disk 2 has been removed from RAID(raid6).
Disk 2 is now N/A state when i checked it out using GUI.
I have just built the raid and am wondering why it happened in just a couple of days.

Could you please give me any advise ?

-------------------- Mail 1 ----------------------
Hello xxxxx

This notification message is generated automatically from N5200 (xxx.xxx.xxx.xxx).
The system experienced the following event(s).


The system N5200 is suffering from disk problem.
RAID is endangered. However, the data access is still functional.
Please solve the disk problem (e.g. replacing with a new hard disk).
The system will bring RAID back to the healthy state automatically.


Please be aware of the event(s) above. Also if necessary, please react to the
event(s).

==============================================
The automated message is generated at 2008-04-04 05:45:44 by N5200 (raid6) (xxx.xxx.xxx.xxx).

-------------------- Mail 2 ----------------------
Hello xxxxxxx

This notification message is generated automatically from N5200 (xxx.xxx.xxx.xxx).
The system experienced the following event(s).


Disk 2 on "N5200" has been removed.


Please be aware of the event(s) above. Also if necessary, please react to the
event(s).

==============================================
The automated message is generated at 2008-04-04 05:46:15 by N5200 (raid6) (xxx.xxx.xxx.xxx).