RAIDar 6.3 identify my ReadyNAS my network but administration is not possible

FWIW, You have a Duo v1 (running 4.1.x).

Often your symptoms are caused a by filling OS partition.  This isn't your data volume, it's a different partition on your disks (and is 2 GB in size).

This can be confirmed and fixed with ssh access, but now is not the time to learn linux.  There are two other options:

-contact paid Netgear support (my.netgear.com), and ask for per-incident support.

-back up the data on your NAS, and then do a factory reset.  That will wipe your NAS.  Then set it up again and restore the data.

I suggest doing the backup right away, even if you do want to use Netgear support.  If it is a filling OS partition, it will get worse (and you will lose access to the data).

Hello BlackBomber,

 
Please check if you can still access and cycle to the boot menu option of the NAS. The NAS may need to be set to telnet/tech support mode and seek assistance from the engineers and/or higher tier who can remote in to the NAS and fix this from the backend. 

Unfortunately, It shows on your records that the support warranty of your product is already expired. You may try contacting support center and avail a support contract. That should allow you to extend the support for your product so they can escalate your issue to L3 or patiently wait for anyone in the community who has the knowledge in the SSH commands and fixing some issues from the backend. Or you could backup the content of the NAS then perform a factory reset and reconfigure the NAS from scratch and transfer back the data. 

 
Regards,
Marty_M 
NETGEAR Community Team