Stuck in Normal Boot, Boot menu working, Read only loads OK, Volumes show OK

I have a RN102 with 2x 3 YB drives in mirror

It worked OK for a few years

Now after reboot it just blincks the power LED in "loading" mode

I can ping it but RAIDar does not detect it

Using the Boot menu I can go in the mode desribed as read only in some places or bypass volume check in others.

I this modethe RAIDar detect is fine and shows as

Model ReadyNAS 102

...

Status  Healthy

Firmware 6.4.2

...

Drives: green tickes on both

If do diagnostics:

Successfully completed diagnostics System Logs

• 2015-10-28 21:35:33: ufsd: "mount" (sdc1): is mounted as NTFS+J (journal started)
• 2015-10-23 21:03:51: ufsd: "mount" (sdc1): is mounted as NTFS+J (journal started)

In this mode I can access OK the admin page and the shares.

I also run a Scrub without any troubles (it took about 30 hours though)

I have a backup of the content but I would like, if possible, to fix this issue without reseting the array, as the data copy will take forever.

Any assistance or ideas would be much appreciated.

Thanks

Cris