Need help with a mount --bind problem ...

sandygws · 09-18-2013, 12:55 PM

Hi all

Running Debian 7 x264 with a pair of HDDs, I have mounted /dev/md127 to /disk2 as follows:

Quote:

/dev/md127 3.6T 197M 3.6T 1% /disk2

That works fine.

But when I try and mount --bind /home/ftpusers/user1/incoming to /disk2/ftp it mounts as follows:

Quote:

/dev/root 20G 1.1G 18G 6% /disk2/ftp

ie it seems to mount the whole 'home' folder on disk2!

'/home/ftpusers/user1/incoming' is a chrooted folder for Pure-FTPD users

What am I doing wrong?

Firerat · 09-19-2013, 05:59 AM

not sure you are doing anything wrong

I get the same kind of output in df -ah

if you look in /disk2/ftp what do you see?
for me I see what I expected to see, the files that were in the dir I bind mounted.

sandygws · 09-19-2013, 10:09 AM

Yes, but the thing I don't understand is why the 'mount' is only 18GB - the same size as 'home'

Surely if I'm mounting the folder to '/disk2/ftp' then it should be the same size as /disk2/ftp?

ie 3.6T and not 18GB

Or not?

Firerat · 09-19-2013, 10:19 AM

nope....

the filesystem is still on /home, and is still constrained by the space available in /home

it is now just available in on two different mountpoints at the same time.

sandygws · 09-19-2013, 10:33 AM

Ahh, I see

Other than pointing a users /ftp/home folder to /disk2/ftp and the 3.6TB of free space, is there any other way?

Firerat · 09-19-2013, 10:43 AM

if you want them to have access to the 3.6TB space, then do it the other way round

i.e.

Code:

mount --bind /disk2/ftp/user1/incoming /home/ftpusers/user1/incoming

but I can't help thinking you need something a little more involved , like volume groups with quotas
https://wiki.debian.org/LVM

sandygws · 09-19-2013, 11:38 AM

Wow, thanks. I didn't know that would work

Can you suggest the correct fstab entry for the above bind?

Firerat · 09-19-2013, 11:57 AM

Code:

/disk2/ftp/user1/incoming /home/ftpusers/user1/incoming auto bind 0 0

But honestly, you should be looking at something more sophisticated/robust, like LVM and mount direct

the fstab line is a little 'hacky' , I don't think you will find it in "man fstab"

sandygws · 09-19-2013, 12:10 PM

I'm looking for the most robust solution to keep that 3.6TB mounted/available permanently

What would you suggest?