couldn't mount RDWR because of unsupported optional features

[zethis]

When:

When tried to mount my usb disk on tomato with this commands (in Install_From_Scratch.sh):

#### Mount /opt
(df -h | grep -q '/tmp/mnt/ENTWARE') && umount /tmp/mnt/ENTWARE
echo "LABEL=ENTWARE /opt ${FILESYSTEM} defaults,data=writeback,noatime,nodiratime 0 0" >/etc/fstab
mount -a

Error in dmesg command:

EXT4-fs (sda1): couldn't mount RDWR because of unsupported optional features (400)

How to fix:

sudo tune2fs -O ^metadata_csum /dev/xxxx

Found it here:
https://unix.stackexchange.com/questions/287159/linux-couldnt-mount-rdwr-because-of-unsupported-optional-features-400

Maybe update the doc ?

Cheers

[toulousain79]

Hi Zethis,

Better late than never :-)
Thanks a lot for your feedback.