[SOLVED] Duplicate files?

[atz6975]

Hi,

I was looking for files in my Nas(314/6.2.4) through ssh.

I found two copies of the files :

One where it is (/data/Documents.....)

One in /var/ftp/

Finally I found that var/ftp contains a lot of the files (Documents, Video) I had in other places.

What is /var/ftp?

Thx

[StephenB · Accepted solution]

Each share is a subvolume.

If you run df . on /var/ftp and /data, you'll see that the subvolumes (a.k.a. shares) have simply been mounted twice.  There are some details here: https://lwn.net/Articles/579009/

[atz6975]

Ok...i was a bit lazy....

Looks like the Nas is mounting there the shares I have FTP enabled for.

du  -hs * shows a very small /var and a big /data.

I'm completely unaware of btrfs magic (subvolumes&friends) but is this how this is done (for my culture)?

Thx for taking the time to enlight me.

[StephenB · Accepted solution]

Each share is a subvolume.

If you run df . on /var/ftp and /data, you'll see that the subvolumes (a.k.a. shares) have simply been mounted twice.  There are some details here: https://lwn.net/Articles/579009/

[atz6975]

Nice! Thx for the info.