TerraMaster Forum

In another thread I've been advised that BTRFS is not 100% reliable on older linux kernels (which apparently I have)

I've managed to acquire a hard drive with enough capacity to take a copy or a backup of my existing raid5 array. It is mounted /mnt/md1 and the original array is mounted on /mnt/md1

What is the recommended way to backup or copy the existing array? And then restore or copy back.

I was thinking -

1) Stop all running applications, such as Docker, Plex etc.(maybe having a look at what system services are running and close any as necessary)
2) ssh to the TNAS and execute (as root) : 3) Go for a nap
4) Reformat /mnt/md0 to EXT4 (not sure of the best option for this - Using the desktop Volume Manager - delete and re-create?)
5) - Assuming the newly created Volume mounts on /mnt/md0
6) Go for another nap
7) Restart the services.

Any and all suggestions welcome.

Looking at what reports, I'm not sure I understand what this mount point is doing:
There is a sub volumes folder in there which is filled with loads of directories each of which look to be linux root directories (assuming for docker containers).

Will the cp command in my original post copy these sub volumes?

Or can I forget about them and they'll re-create when I restart docker?