Lost all my data on my RN104 - anything I can do?

Thanks for your comments mdgm. But I still have some issues here.

First off it's true that the drives are not on the compatibility list so I accept that. I stand by my comment about external usb drives. I would have only lost the data on the drive that failed, instead now I have one drive that failed and lost ALL the data on ALL drives. :(

Only the Hitachi was an older drive that didn't give me any issues previously. The other 3 drives were new.

So here's my complaint about the 'system'. First off I didn't notice any issues with the drives because I only occasionally looked at the logs. The disk issues that you showed from my log all were listed with green dots (meaning ok??) and were not warnings or errors but showed as info so a casual glance at the logs wouldn't have alerted me to a problem.

The 'overview' page showed my status as 'healthy' even after I knew that I had 'one' drive failing. I had downloaded a copy of RAIDar and it showed 4 healthy drives with green check marks and a status of healthy as well.

I did not know that I had failing disks from months ago and I didn't see any warnings until the Seagate drive showed up as a warning on my admin page just last week. I didn't know the Hitachi was failing either until you posted my logs.

In future I'll know that the ReadyNas does not throw warning messages when drives start reporting errors but that I need to purposely scan the logs for this.