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 >