Data volume failed to mount


On my My Cloud 2TB dashboard, there is a critical notification named “Data volume failed to mount”.

The LED has turned red on the NAS.

I listed partitions by entering “df -H” :

WDMyCloud:/dev# df -HFilesystem      Size  Used Avail Use% Mounted onrootfs          2.1G  2.1G     0 100% //dev/root       2.1G  2.1G     0 100% /tmpfs            42M  3.7M   39M   9% /runtmpfs            42M   66k   42M   1% /run/locktmpfs            11M     0   11M   0% /devtmpfs           5.3M     0  5.3M   0% /run/shmtmpfs           105M  3.3M  102M   4% /tmp/dev/root       2.1G  2.1G     0 100% /var/log.hddramlog-tmpfs     21M  2.8M   19M  14% /var/log
 4 4828MB 2000GB 1996GB primary

And if i try to reset by entering :

/usr/local/sbin/ noreformat

 It gives me :

/usr/local/sbin/ line 33: echo: write error: No space left on device

 How can I clean the rootfs folder?

Sorry for my english, i’m french

Welcome to the Community.

Maybe you should try contacting WD’s Technical Support about this. You can do so either by phone or email.

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somthing doesn’t look right there, i will try to take a closer look tonight

in the meantime try the command below to look for large files

find / -type f -size +100M -exec ls -l {} ;