Synology WARNINGS

Although the Synology is a superbe box (mainly because it allows us full control), there are some miss-habits. You'll probably find this page when it's to late, but hey.. maybe there is something you haven't walked into and it saves you a day...

ROOT fs will be wiped during DSM upgrade

I have lost 10's of hours of nice scripting, because I had put them in /root. Found the explanation here. 

Perform filesystem check using e2fsck

Find the volumes (like /dev/vg1/volume_1)

df -h

Set syno in debug mode to close usage of the volume

sudo syno_poweroff_task -d

Enable the volume 

sudo vgchange -ay

Perform the file system check

sudo fsck.ext4 -pvf -C 0 /dev/vg1/volume_1

OR
e2fsck -p -y -f -v /dev/vg1/volume_1

If you get the message "UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY", try: fsck.ext4 -yvf -C 0 /dev/vg1/volume_1

Reboot the server:

reboot