Ready NAS Ultra 6 Plus - OS 6.9.5 6.10 Upgrade Fail - Safe Mode Options

Question

Hello,I realize this is a legacy device, and that OS 6 is not officially supported, but I hope someone here can help.&nbsp;I previously updated my legacy Ready NAS Ultra 6 Plus (6x 3TB drives) from OS 4.2.XX to OS 6.9.5 without any problems.&nbsp; Tonight I was prompted to upgrade the OS to 6.10, without performing a backup (my bad), and after reboot, the NAS:&nbsp;1. Passes the Root FS check;2. Boots in increments going to 99% and stops;3. Enters into 6.9.5 safe mode.&nbsp;RAIDar 6.5.0 detects the NAS and shows:1. Name: readnasos2. Firmware: 6.9.53. Status: Volume data RAID Level 5, Inactive, 100% of the volume used4. All Drives show a green checkmark.5. Offline Setup (LAN) is the only option.&nbsp; No option to Download Logs or perform Diagnostics.&nbsp;Logging into the Admin interface, the message is "ReadyNAS failed to boot successfully" and provides several options include formatting the Volumes, OS Reinstall, and Boot into Read-Only mode.&nbsp;I want to avoid formatting the Volume for obvious reasons.&nbsp;I've performed OS Reinstall several times with no success.&nbsp; I moved all 6 drives to another Ultra 6 Plus unit (running 6.9.5) and the same problem occurred.&nbsp; Tried to use NAS #2 to OS Reinstall with no success.&nbsp; Moved the drives back to NAS #1, where the problem persists.&nbsp;I want to boot into Read Only mode and access the data, but the Boot Menu on this Legacy NAS does not provide the option, at least as a top-level option.&nbsp;I also attempted a USB Recovery using the 6.9.5 x86 firmware, using 3 different USB sticks, but could not get the NAS to enter USB Recovery mode.&nbsp;I hope someone else has run into the same problem as I have and can offer some suggestions.&nbsp;Thanks!

mdgm · Answer

The NAS uses mdadm raid with BTRFS on top.The tools provided are sufficient to diagnose it and if possible to give access back to data. You just need to know what to use and why/when/how to use it.A factory reset is a drastic step and if just the root volume is messed up it would be a shame to wipe all your data if your backup is not up to date, when the problem *might* be straightforward to fix.

StephenB · Answer

Do you have experience with linux commands?&nbsp; There are some things you could try in tech support mode.
&nbsp;
ReclaiMe RAID recovery software is another option, though it is expensive (and requires a way to connect all your disks to a PC).

UltraGar · Answer

I don't have a lot of experience with Linux, but am willing to try. Would I be doing steps similar to this to try mounting the volume in Read Only mode?

https://community.netgear.com/t5/Using-your-ReadyNAS-in-Business/Disk-volume-no-longer-active-force-activation/m-p/1553673#M144637

StephenB · Answer

&nbsp;
UltraGar&nbsp;wrote:
Would I be doing steps similar to this to try mounting the volume in Read Only mode?
&nbsp;
https://community.netgear.com/t5/Using-your-ReadyNAS-in-Business/Disk-volume-no-longer-active-force-activation/m-p/1553673#M144637
&nbsp;

You could try that, and if those commands work do a backup of the NAS.
&nbsp;
You'd boot in tech-support mode, and telnet into the NAS.&nbsp; User/pass is root/infr8ntdebug
Then enter
# rnutil chroot
Which will start RAID and chroot.
&nbsp;
It might be worth trying to re-apply the firmware update next.&nbsp; You'd do this by
# touch /.os_update# reboot
If that fails, you'd have to reboot in tech support mode, and go in again.
&nbsp;
&nbsp;

UltraGar · Answer

StephenB&nbsp;wrote:&nbsp;UltraGar&nbsp;wrote:Would I be doing steps similar to this to try mounting the volume in Read Only mode?&nbsp;https://community.netgear.com/t5/Using-your-ReadyNAS-in-Business/Disk-volume-no-longer-active-force-activation/m-p/1553673#M144637&nbsp;You could try that, and if those commands work do a backup of the NAS.&nbsp;You'd boot in tech-support mode, and telnet into the NAS.&nbsp; User/pass is root/infr8ntdebugThen enter# rnutil chrootWhich will start RAID and chroot.&nbsp;It might be worth trying to re-apply the firmware update next.&nbsp; You'd do this by# touch /.os_update# rebootIf that fails, you'd have to reboot in tech support mode, and go in again.&nbsp;&nbsp;Thanks for the valuable information&nbsp;StephenB!&nbsp; I was able to enter Tech Support mode and use the login information to perform some tasks.&nbsp;The rnutil chroot command did not work because there's no bash available, however, using the information from the other thread, I found mdadm and btrfs already installed and was able to mount the RAID volume in read-only and it appears intact.&nbsp; It's reassuring to at least see the files and folders there.&nbsp;It's a little slow going in part to getting acquainted with the Busybox Linux, getting SSH running through Dropbear, and not quite succeeding with WinSCP (which likes bash or ksh) or SFTP yet.&nbsp; Will also try to transfer files via USB once I figure out how to find and mount it.&nbsp;I took a peek at the Boot volume and noticed that I'm only using about 25% of the avalable space (2.7G free).&nbsp; Thought maybe it was full and caused a problem on the upgrade.&nbsp; Once I get the files off, I'll try re-running the upgrade.&nbsp; At USB 2.0 transfer speeds, this could be a while.&nbsp;As a related question, would I be able to take these OS6-formatted drives and transfer them over to a newer unit, like the RN426 (6 drives in the legacy unit, 6 slots in the new unit), use the boot menu to get into Read-Only mode to access the data that way (I don't have Read-Only option on the Ultra 6 Plus)?&nbsp; If so, and assuming no corruption or failed disks, would I be able to simply transfer the files via SMB instead?&nbsp;Anyway, thanks again for the help&nbsp;StephenB!&nbsp; I'll check in again soon!&nbsp;&nbsp;

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Ready NAS Ultra 6 Plus - OS 6.9.5 >> 6.10 Upgrade Fail - Safe Mode Options

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