On a server with RHEL 7.2 it gets to emergency mode when rebooting. Looking a bit I found out that what happens is that the /home partition was missing and the reason was LVM:

```
  --- Logical volume ---
  LV Name                /dev/rhel/home
  VG Name                rhel
  LV UUID                6GB8TR-ih7d-vg7J-xCLE-A8OH-gmwy-3XLyOb
  LV Write Access        read/write
  LV Status              NOT available
  LV Size                200.88 GiB
  Current LE             51425
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto

```

In this emergency mode, if I do

```
  vgchange -a y

```

the volume becomes "active" and I can mount it and see the content. The problem is that after rebooting, the same problem appears... 

1) Why is this happening?

2) If vgchange -a y is the only solution, how can I make this permanent after each reboot?