Comment 15 for bug 1339249

I also experienced this problem, at each and every boot. For me the
following line in /etc/fstab was the culprit:

UUID=B2BD-9FDE /data/shared vfat utf8,umask=007,gid=46 0 2

Somehow this line caused `mountall` to run `fsck.vfat` at each and
every boot, and so the boot process would always hang at "Starting
remaining boot-time encrypted block devices..." for about 5 minutes
before continuing as normal -- even though I made sure that the
partition was cleanly unmounted and that the dirty bit was *not* set!

I solved it by setting the <pass> value to 0, so that the partition is
never checked at all:

UUID=B2BD-9FDE /data/shared vfat utf8,umask=007,gid=46 0 0

Not ideal, but at least I can boot the system normally.