Getting RAID 5 degraded status

[bcazelle]

Hi there,
I'm new here since my good old N4100 has been working fine for years until yesterday.
Suddenly, I could not write or delete any files contained in the Thecus.
Disk information menu says all 4 disks are OK
In the RAID information menu the RAID status: degraded (blinking).
Clicking on "Config" shows that all disks are OK, but the RAID box for disk 1 is not ticked anymore, contrary to other 3 disks.
Having said that, I do not dare do anything. I looks like I could tick the "free" box...
Any idea on how I could solve this issue?
Thanks in advance.

Bernard

My config:
Thecus N4100 (firmware 1.3.04) with 4 Maxtor 300 GB configured in RAID5

[edgar]

Hi,

You have a failure on drive1.
DO NOT power off the box.
Remove the drive.
Put a new one.

Raid rebuild should begin.

Eventually, you can fix the drive and use it elsewhere.

Ed