Remove inactive volumes to use the disk. Disk #1,2,3,4,5,6

There are a lot of causes for the inactive volume problem, and normally I recommend using Netgear support.  

But that is not available to you, since you have a converted legacy ReadyNAS.  rn_enthusiast sometimes helps users here with this problem, and might chime in here.  Get a full log zip file while you are waiting.

Do you have a backup of the files?  It would be more direct to do a factory reset, and restore the files from backup.

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bolter wrote:

I have a Readynas ultra 6 plus. After upgrading to OS 6.10.7 I now get a message saying Raid 5 inactive remove inactive volumes to use the disk in Raidar.

 

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If you mean right after the upgrade, that's to be expected.  The OS6 is incompatible with the old file system from OS4.2.x.  That's why all the conversion instructions say the first step is to backup the data and that the conversion does a factory default.  If that's the case, but you never did the factory default last step in the conversion, you should be able to do a USB recovery to OS4.2.31 and see your data again so you can back it up before doing the conversion again.

If that's not the case, then don't you still have the backup you made before the conversion?