Problem with Yosemite?

I am unable to get to my TimeMachine backup on my ReadyNas Ultra 4 Plus after upgrading to Yosemite 10.10. RaidAR no longer works, as well. Any suggestions?

What version of RAIDiator are you running?

As for RAIDar that depends on an old version of Java which needs to be installed again after a major OS X update.

I can log in thru a browser and see my system via RAIDiator with no issue. I can play music files off the drives. I know the drives are working. But time machine will not see the drives to even attempt a back up.

I just installed new firmware on the NAS about 2 weeks ago, and a few days later installed Yosemite then the issues occurred. So the NAS is on the latest firmware.

So, just to confirm your NAS is running 4.1.14?

Correct - cut and paste from my screen: RAIDiator 4.1.14 [1.00a043]

Can you send me your logs (see link in my sig)?

logs emailed over
thank you

Looks like it is having trouble getting the quota for the Time Machine user.

Your WD 1.5TB Green disks are not on the compatibility list and have very high load cycle counts. One of your disks (disk 1) has over 100 ATA errors.

Do you have an up to date backup?

Up to date backup of the NAS? no. I've tried backing it up a few times to an external HD and it almost always failed. Should I buy new Hard drives and replace them (hot swap) 1 at a time? Is that my only hope here?

Well disk 1 certainly needs replacing.

The way forward would depend on how important your data is to you.