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ReadyNAS Ultra 2 plus Corrupt root
Just replaced both drives after disk failure (retired the old ones) with new unformatted drives. RAIDar shows "corrupt root" error after trying to do volume setup. Tried factory default and get same ...
After I was getting the corrupt root error I checked both drives via a USB caddy in a windows machine to check for a previous format. They were both functional but unfomatted (both are new drives). I decided to add a Windows format to check if defective. They both show up just fine and usable in Windows. I then deleted that format and re-installed in the NAS. Same result with corrupt root error.
One option is to do use the boot menu to do a factory default. See pages 14-15 here: http://www.downloads.netgear.com/files/GDC/RNDU2000/ReadyNAS_Ultra_UltraPlus_NVX_Pro_HW_en_8July11.pdf
Another option is to use either Seagate's Seatools software or WDC's Lifeguard software to zero the drives. Lifeguard has an option for a "quick zeros" test - that is much faster than zeroing the entire drive, and is enough to remove all traces of any partitioning.
I have tried the factory default option several times in the boot menu. It always comes back as corrupt root.
I also used to Seatools to zero the drive(s). Still comes back with corrupt root error.
Welcome to the Community!
Have you tried doing OS reinstall and if it did not work then USB recovery for OS 4.2? There might be a problem with the OS. If this still did not resolve the issue then contacting Paid Support might be the last option.
Regards
I did try the OS reinstall with no change. I also tried the USB recovery but could never get the NAS to take the boot from the key (tried 4 different USB sticks) - activity would stall after a few seconds of activity.
I also had this issue earlier with a ReadyNas Duo v2 but the usual suggestions worked for it. I can only guess that the Ultra is different enough that it requires a unique approach.
As a last gasp I was able to workaround this issue by re-installing the drive that did not fail. Considering all the poking and resets I did to this NAS box I was shocked the thing booted up. After it launched I was able to get into the admin and then hot popped in one of the new drives (the ones that were giving me the corrupt error) and the box proceeded to prepare and sync the drive. Go figure... I tried this same sort of thing early on but tried it from a cold start - and it did not work.
So, original problem not solved...but good enough.
I do not have a real understanding of how the ReadyNAS stores the OS. Is it on the box, is it on the drive, is it on both?
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