Ready NAS Ultra 2 - "No volume available"

Hi,

All of a sudden and judging from the log my volumes were "lost" during/after an automatic firmware update. Using the RAIDar Tool it seems i can add back one of my two 2TB Seagate Disks i.e. is the other seemingly unavailable. I am not sure how to proceed to get this back to how i had it. I was not running RAID and do have backup on an external drive so it is not a disaster as such, but annoying. Suppose i have the following questions:
- Is there any way to recover the old setup and data?
- If not, and given i have to add the new volumes - how do i get the seemingly non-available disk to work? Is it invisible because it is dead?
- How did this happen?

Kind Regards,
Anders

	Tue Jul 15 18:45:19 CAT 2014	System is up.
	Tue Jul 15 18:45:07 CAT 2014	Your ReadyNAS device has been updated with a new firmware image. (RAIDiator-x86 4.2.26)
	Tue Jul 15 18:45:01 CAT 2014	Volume scan failed to run properly.
	Tue Jul 15 18:37:48 CAT 2014	Please reboot your ReadyNAS device to continue with the update process.
	Tue Jul 15 18:31:45 CAT 2014	Blinking disk 2.
	Sun Jul 13 19:04:30 CAT 2014	System is up.
	Sun Jul 13 19:04:14 CAT 2014	Volume scan failed to run properly.
	Sat Jul 12 20:26:01 CAT 2014	System is up.
	Sat Jul 12 20:25:46 CAT 2014	Volume scan failed to run properly.
	Sat Jul 12 19:15:43 CAT 2014	System is up.
	Sat Jul 12 19:15:27 CAT 2014	Volume scan failed to run properly.
	Thu Jun 19 06:25:02 CAT 2014	Volume C is approaching capacity: 80% used 756G available
	Mon Jun 16 13:12:21 CAT 2014	System is up.
	Wed May 28 12:54:52 CAT 2014	System is up.
	Wed May 28 12:54:40 CAT 2014	Your ReadyNAS device has been updated with a new firmware image. (RAIDiator-x86 4.2.26)
	Tue Mar 25 11:55:29 CAT 2014	Please reboot your ReadyNAS device to continue with the update process.
	Tue Mar 25 11:31:39 CAT 2014	System is up.
	Tue Mar 25 11:31:27 CAT 2014	
	Thu Mar 6 16:44:39 CAT 2014	Error encountered uploading update image.
	Thu Mar 6 16:10:43 CAT 2014	System is up.
	Thu Mar 6 16:10:31 CAT 2014	Your ReadyNAS device has been updated with a new firmware image. (RAIDiator-x86 4.2.25)
	Sat Jan 25 04:08:55 CAT 2014	Please reboot your ReadyNAS device to continue with the update process.
	Sat Jan 18 10:44:43 CAT 2014	System is up.
	Tue Jan 7 19:58:07 CAT 2014	System is up.
	Tue Nov 26 19:31:33 CAT 2013	System is up.
	Wed Nov 20 13:05:10 CAT 2013	System is up.
	Tue Oct 15 08:03:25 CAT 2013	System is up.
	Sat Oct 12 19:21:25 CAT 2013	System is up.
	Thu Oct 3 00:00:36 CAT 2013	System is up.
	Mon Sep 23 17:48:52 CAT 2013	System is up.
	Sat Sep 14 10:20:08 CAT 2013	System is up.
	Tue Sep 3 19:50:34 CAT 2013	System is up.
	Fri Aug 30 20:00:41 CAT 2013	System is up.
	Wed Aug 21 20:02:41 CAT 2013	System is up.
	Wed Aug 21 19:52:31 CAT 2013	System is up.
	Wed Aug 21 19:41:56 CAT 2013	System is up.
	Wed Aug 21 19:31:17 CAT 2013	System is up.
	Wed Aug 21 19:20:56 CAT 2013	System is up.
	Wed Aug 21 17:24:04 CAT 2013	System is up.