#!/bin/bash -x

set -e

here="$HOME/lp1381961"
file="$here/sparse-file"
loop="/dev/loop7"
md="/dev/md7"
mnt="$here/mnt"

rm -f "$flie"
dd if=/dev/zero of="$file" bs=1k seek=1024000 count=1
losetup "$loop" "$file"
#mdadm --create "$md" --auto md --level=1 --raid-devices=1 --force "$loop"
mkfs.ext4 "$loop"

echo "*** before mount ..."
ls -lash "$file"

mkdir -p "$mnt"
mount "$loop" "$mnt"
echo "*** copy files ..."
cp -rp /home/daniel/.jd_home/ "$mnt"

echo "*** sync ... "
sync

echo "*** du before trim..."
du -h --max-depth=1 "$mnt"
echo "*** before trim ..."
ls -lash "$file"
fstrim -v "$mnt"

echo "*** after trim ..."
ls -lash "$file"
echo "*** du after trim..."
du -h --max-depth=1 "$mnt"
umount "$mnt"

echo "*** after umount ..."
ls -lash "$file"
fsck -v -f -F "$loop"

losetup -d "$loop"