which label to use in mount?

[Sergei G]

Thank you for all the comments.  I have decided to go with GPT mount.

I rerun size checks and was not able to reproduce the difference 
reported previously with or without df -H option.  So, it appears to be 
my bad.  here is a short log:

% sudo mount /dev/ufs/back /backup/
% df /backup/
Filesystem    1K-blocks    Used    Avail Capacity  Mounted on
/dev/ufs/back  50778204 2403432 44312516     5%    /backup
% du /backup/
2403432    /backup/

% sudo umount /backup/

% sudo mount /dev/gpt/dback /backup
  % df /backup/
Filesystem     1K-blocks    Used    Avail Capacity  Mounted on
/dev/gpt/dback  50778204 2403432 44312516     5%    /backup
% du /backup/
2403432    /backup/


On 12/15/15 7:37 PM, Sergei G wrote:
> I have executed the following commands:
>
>   # gpart create -s GPT ada1
>   # gpart add -t freebsd-ufs -l sback -s 50G ada1
>   # newfs -nL back /dev/ada1p1
>
> so, now I can mount it as either:
>
>   # mount /dev/gpt/sback /mnt
> or
>   # mount /dev/ufs/back /mnt
>
> Both seem to work.  However, command
>
>   df -H
>
> reports slightly different numbers:
>
> /dev/ufs/back                           52G    4.1k     48G     0%    /mnt
> dev/gpt/dback                          48G    4.0K     45G     0%    /mnt
>
> Which way is the correct way to mount?
>
>
> Thanks