Startup issue and access lost (shares + frontview) on RNDU2000 OS6 (Ultra 2)

You might want to try using RAIDar to check the status with the 8 TB disks installed:

• https://kb.netgear.com/20684/ReadyNAS-Downloads

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ILoveYou wrote:

 

I've done some research on the community posts and suppose the system disk is full:

https://community.netgear.com/t5/Using-your-ReadyNAS-in-Business/ReadyNAS-system-partition-OS-storage-free-space/td-p/887179

 

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That is a possibility, though it is possible something else is going on.

Did you try booting up the system with just disk 2 installed (leaving slot 1 empty)?

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ILoveYou wrote:

 

1- remove the disks, mount them on a linux distribution (I have Ubuntu USB version), clean the disk: The problem is that when I do this I can't mount the disks. I don't know enough about Linux. I tried with mdadm but it didn't work => Does anyone have a clear procedure for accessing at least the system partition?

 

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Note you also need to install btrfs on Ubuntu.

Instructions for data volume access depend a bit on the expansion history - when you converted to OS-6, did you start with 2x8 TB, or something smaller?

Note the OS partition is a fixed size, so that wouldn't depend on the expansion history.

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ILoveYou wrote:

 

2- SSH access via the tech support boot menu, clean directories using command lines: in theory this seems possible:

https://community.netgear.com/t5/Using-your-ReadyNAS-in-Business/Enable-rsync-ssh-frontview-from-tech-support-mode-on-ReadyNAS-NV/td-p/1669274

but once I've started up in tech support mode, I can't connect via SSH (connection refused) nor Telnet (incorrect login)

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Tech support mode requires telnet, not ssh.  The user name is root, the password is infr8ntdebug 

You will need more info to troubleshoot (starting raid, etc) - you can post back once you've sorted out the access problem.