View source for Move Nix Store to new partition

The tutorial will teach you how to relocate `/nix` to a new
device.

The device that /nix is on has no more space

    $ du -h
    Filesystem      Size  Used Avail Use% Mounted on
    /dev/sda1       182G  180G    2G  99% /

Stop nix daemon

    $ sudo systemctl stop nix-daemon.service

Move backup /nix; mv /nix to /nix.bak

    $ ls -alF /nix
    total 1068
    drwxr-xr-x    4 root root      4096 Jan 22 02:43 ./
    drwxr-xr-x   26 root root      4096 Feb  8 12:17 ../
    drwxrwxr-t 1555 root nixbld 1077248 Feb  8 12:05 store/
    drwxr-xr-x    4 root root      4096 Jan 22 02:43 var/
    $ cd /
    $ tar -afp /nix.tgz /nix /nix.bak
    $ sudo mv /nix /nix.bak # incase something goes horribly wrong

Mount new device. You will need to add this device to `/etc/fstab`

    $ mount /nix
    $ du -h
    Filesystem      Size  Used Avail Use% Mounted on
    /dev/sdb1       300G    0G  300G   0% /nix

Restore /nix from /nix.tgz; verify contents

    $ cd /
    $ sudo tar -xf /nix.tgz 
    $ nix-store --verify --check-contents

Start up nixdaemon

    $ sudo systemctl start nix-daemon.service


[[Category:Tutorial]]
[[Category:NixOS]]