There is no default directory "/var/mapper."  It is supposed to be /dev/mapper.
Can you do all of that steps again, but before you reboot, can you please give me the output of the following files:

>cat /dev/mapper
>cat /etc/fstab
>cat /etc/crypttab



On Sun, Jul 29, 2012 at 10:59 PM, Todd And Margo Chester <[log in to unmask]> wrote:
On Sun, Jul 29, 2012 at 7:37 PM, Todd And Margo Chester
<[log in to unmask] <mailto:[log in to unmask]>> wrote:

    Hi All,

    I can set up "/dev/mapper/lin-bak" with

         # cryptsetup luksOpen /dev/sdb1 lin-bak

    but it disappears after I reboot. This messes up my
    crypttab/fstab. Any idea what I am doing wrong?

    Many thanks,
    -T


On 07/29/2012 06:15 PM, Tam Nguyen wrote:> Hi Todd,

> Did you create a file journal (mkfs...) after you executed the command?:
>
>       # cryptsetup luksOpen /dev/sdb1 lin-bak
>
>
> Basic steps are:
> 1) cryptsetup luksFormat /dev/xyz
> 2) cryptsetup luksOpen /dev/xyz  abc   <---then verify it in /dev/mapper
> 3) mkfs.ext4 /dev/mapper/abc     <--- i like to use ext4.  Do research
> on this journal if you're not clear.
> Now that we got it settled.  Come the fun part- automounting:
> 4) configure your /etc/fstab
> 5) then configure your /etc/crypttab
> Before you reboot your machine, do a tested mount:
>  >mount -a
>
> -Tam
>


Yes, did all that.   I can mount too.  But, when I reboot,
lin-bak disappears from /var/mapper.   AAAHHHH!

-T