Todd, 
Before you run mkfs...., understand that your device sdb1 will be formatted(all previous data will be gone).  So be VERY CAREFUL with mkfs....



On Sun, Jul 29, 2012 at 7:37 PM, Todd And Margo Chester <[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