NVX: paths for the shares listed below could[Case #19821175]

I upgraded one of the drives, every thing was fine, expanded fine and I was accessing all files fine till today when:

Mon Nov 5 20:33:55 PST 2012 System is up.
Mon Nov 5 20:33:55 PST 2012 The paths for the shares listed below could not be found. Typically, this occurs when the ReadyNAS is unable to access the data volume. media squid backup pub
Mon Nov 5 20:33:39 PST 2012 Volume scan found errors that it could not easily correct. Please ensure that you have current backups of all valuable data before performing a full volume scan by rebooting the NAS through Frontview with the volume scan option enabled.
Mon Nov 5 20:32:42 PST 2012 Rebooting device...
Mon Nov 5 20:32:42 PST 2012 Please close this browser session and use RAIDar to reconnect to the device. System rebooting...
Mon Nov 5 19:06:51 PST 2012 System is up.
Mon Nov 5 19:06:51 PST 2012 The paths for the shares listed below could not be found. Typically, this occurs when the ReadyNAS is unable to access the data volume. media squid backup pub
Mon Nov 5 19:06:30 PST 2012 Volume scan failed to run properly.
Mon Nov 5 00:32:47 PST 2012 Powering off device
Mon Nov 5 00:32:47 PST 2012 Please close this browser session and use RAIDar to reconnect to the device after it is powered back on. System powering off...
Sun Nov 4 18:36:55 PST 2012 Fan will be recalibrated over the next few minutes.
Sun Nov 4 18:29:56 PST 2012 ReadyDLNA media file rescan started.
Sun Nov 4 18:21:42 PST 2012 System is up.
Sun Nov 4 18:21:33 PST 2012 Your ReadyNAS device has been updated with a new firmware image. (RAIDiator-x86 4.2.21)
Sun Nov 4 18:18:54 PST 2012 Rebooting device...
Sun Nov 4 18:18:53 PST 2012 Please close this browser session and use RAIDar to reconnect to the device. System rebooting...
Sat Nov 3 12:15:42 PDT 2012 Fan will be recalibrated over the next few minutes.
Sat Nov 3 09:42:46 PDT 2012 Data volume has been successfully expanded to 4624 GB.
Sat Nov 3 08:51:06 PDT 2012 System is up.
Sat Nov 3 08:50:51 PDT 2012 Incompleted file system expansion detected. Resuming...
Sat Nov 3 08:49:45 PDT 2012 Rebooting device...
Sat Nov 3 08:49:45 PDT 2012 Please close this browser session and use RAIDar to reconnect to the device. System rebooting...
Sat Nov 3 08:30:33 PDT 2012 Newly added drive has more space to expand the volume, will start volume expansion.
Sat Nov 3 08:30:26 PDT 2012 RAID sync finished on volume C.
Fri Nov 2 19:17:02 PDT 2012 RAID sync started on volume C.
Fri Nov 2 19:16:42 PDT 2012 Data volume will be rebuilt with disk 2.