#!/bin/bash
#
# This script is provided "as is" without warranty of any kind, either expressed or implied, including, but not limited to, the implied warranties of merchantability, fitness for a particular purpose, or non-infringement.
#
# License GPL2
#
# by desgua 2014/04/29
function CLEAN {
cd "$pasta"
[ -f test-trim-by-desgua ] && rm test-trim-by-desgua && echo "Temp file removed"
echo "Goodbye"
exit 0
}
trap 'echo ; echo "Aborted." ; CLEAN; echo ; exit 0' INT HUP
if [[ "$(echo $USER)" != "root" ]]; then
read -n 1 -p 'Become root? [Y/n]' a
if [[ $a == "Y" || $a == "y" || $a == "" ]]; then
sudo $0 $1
exit 0
else
echo "
This script needs root privilege.
"
exit 1
fi
fi
name=$(echo $0 | sed 's/.*\///')
if [ $# -ne 1 ]; then
echo "
Usage: $name /folder/to/test/
"
exit 1
fi
pasta=$1
read -n 1 -p 'Use fstrim? [y/N]' a
if [[ $a == "Y" || $a == "y" ]]; then
fs=1
fi
method=
while [[ "$method" != "1" && "$method" != "2" ]]; do
read -n 1 -s -p 'Choose a method:
[1] hdparm (will fail in LUKS on LVM)
[2] filefrag (warning: you may have to force quit - close the terminal - in some cases of success trim if you see an output that never ends)
' method
done
function SDATEST {
disk=$(fdisk -l | grep /dev/sda)
if [ "$disk" == "" ]; then
echo "
fdisk did not found /dev/sda
"
exit 1
fi
}
function TEST {
echo "Entrying /" ; echo
cd $pasta
echo "Creating the file test-trim-by-desgua at $pasta" ; echo
dd if=/dev/urandom of=test-trim-by-desgua count=10 bs=512k
echo "Syncing and sleeping 2 seconds." ; echo
sync
sleep 2
hdparm --fibmap test-trim-by-desgua
lbab=$(hdparm --fibmap test-trim-by-desgua | tail -n1 | awk '{ print $2 }')
echo "As you can see, the file was created and its LBA begins at $lbab" ; echo
echo "Syncing and sleeping 2 seconds." ; echo
sync
sleep 2
echo "Removing file test-trim-by-desgua" ; echo
rm test-trim-by-desgua
trap 'echo ; echo ; echo "Aborted." ; echo ; exit 0' INT
echo "Syncing and sleeping 2 seconds." ; echo
sync
sleep 2
if [[ "$fs" == "1" ]]; then
echo "fstrim $pasta && sleep 2" ; echo
fstrim $pasta
sleep 2
fi
echo "This is readed from sector $lbab: "
hdparm --read-sector $lbab /dev/sda
pass=$(hdparm --read-sector $lbab /dev/sda | grep "0000 0000 0000 0000")
if [[ $pass == "" ]]; then
echo "
Trim failed...
You should see only 0000 0000 0000 0000 ...
"
else
echo "Success!!!"
fi
exit 0
}
function LUKSTEST {
# Reference: http://unix.stackexchange.com/questions/85865/trim-with-lvm-and-dm-crypt#
echo 1 > /proc/sys/vm/drop_caches
cd $pasta
echo "Creating a \"yes\" file."
yes | dd iflag=fullblock bs=1M count=1 of=test-trim-by-desgua
#position=`filefrag -s -v test-trim-by-desgua | grep "eof" | awk '{ print $3 }'`
position=`filefrag -s -v test-trim-by-desgua | grep "eof" | sed 's| ||g ; s|.*255:|| ; s|\.\..*||'`
[[ "$position" == "" ]] && echo "Could not find the position of the file. Are you on a LUKS on LVM?" && CLEAN;
device=`df test-trim-by-desgua | grep "dev/" | awk '{ print $1 }'`
yes=`dd bs=4096 skip=$position count=256 if=$device | hexdump -C`
echo "In the next line you should see a pattern like:
00000000 79 0a 79 0a 79 0a 79 0a 79 0a 79 0a 79 0a 79 0a |y.y.y.y.y.y.y.y.|
$yes
"
if [[ "`echo "$yes" | grep "y.y.y"`" == "" ]]; then
echo "The pattern could not be checked. Something went wrong. Exiting."
CLEAN;
else
echo "Pattern confirmed."
fi
echo "Removing the temp file."
rm test-trim-by-desgua
echo "Syncing."
sync
sleep 1
if [[ "$fs" == "1" ]]; then
echo "fstrim -v $pasta && sleep 2" ; echo
fstrim -v $pasta
sleep 2
fi
# Drop cache
echo 1 > /proc/sys/vm/drop_caches
echo "In the next line you should **NOT** see a yes pattern like:
00000000 79 0a 79 0a 79 0a 79 0a 79 0a 79 0a 79 0a 79 0a |y.y.y.y.y.y.y.y.|
If you see, then trim is not working:
`dd bs=4096 skip=$position count=256 if=$device | hexdump -C`"
yes=`dd bs=4096 skip=$position count=256 if=$device | hexdump -C`
if [[ "`echo "$yes" | grep "y.y.y"`" != "" ]]; then
echo "TRIM not working."
else
echo "TRIM is working!"
fi
CLEAN;
}
if [[ "$method" == "1" ]]; then
SDATEST;
TEST;
elif [[ "$method" == "2" ]]; then
LUKSTEST;
fi
exit 0