framework-2024-05-25-15-41-10
This commit is contained in:
Alexander Szczepanski
182
home/bin/trim-check
Executable file
182
home/bin/trim-check
Executable file
@ -0,0 +1,182 @@
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#!/usr/bin/env bash
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#
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# 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.
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#
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# License GPL2
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#
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# by desgua 2014/04/29
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function CLEAN {
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cd "$pasta"
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[ -f test-trim-by-desgua ] && rm test-trim-by-desgua && echo "Temp file removed"
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echo "Goodbye"
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exit 0
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}
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trap 'echo ; echo "Aborted." ; CLEAN; echo ; exit 0' INT HUP
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if [[ "$(echo $USER)" != "root" ]]; then
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read -n 1 -p 'Become root? [Y/n]' a
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if [[ $a == "Y" || $a == "y" || $a == "" ]]; then
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sudo $0 $1
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exit 0
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else
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echo "
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This script needs root privilege.
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"
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exit 1
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fi
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fi
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name=$(echo $0 | sed 's/.*\///')
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if [ $# -ne 1 ]; then
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echo "
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Usage: $name /folder/to/test/
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"
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exit 1
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fi
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pasta=$1
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read -n 1 -p 'Use fstrim? [y/N]' a
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if [[ $a == "Y" || $a == "y" ]]; then
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fs=1
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fi
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method=
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while [[ "$method" != "1" && "$method" != "2" ]]; do
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read -n 1 -s -p 'Choose a method:
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[1] hdparm (will fail in LUKS on LVM)
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[2] filefrag (warning: you may have to force quit - close the terminal - in some cases of success trim if you see an output that never ends)
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' method
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done
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function SDATEST {
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disk=$(fdisk -l | grep /dev/nvme0n1)
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if [ "$disk" == "" ]; then
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echo "
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fdisk did not found /dev/nvme0n1
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"
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exit 1
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fi
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}
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function TEST {
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echo "Entrying /" ; echo
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cd $pasta
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echo "Creating the file test-trim-by-desgua at $pasta" ; echo
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dd if=/dev/urandom of=test-trim-by-desgua count=10 bs=512k
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echo "Syncing and sleeping 2 seconds." ; echo
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sync
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sleep 2
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hdparm --fibmap test-trim-by-desgua
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lbab=$(hdparm --fibmap test-trim-by-desgua | tail -n1 | awk '{ print $2 }')
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echo "As you can see, the file was created and its LBA begins at $lbab" ; echo
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echo "Syncing and sleeping 2 seconds." ; echo
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sync
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sleep 2
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echo "Removing file test-trim-by-desgua" ; echo
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rm test-trim-by-desgua
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trap 'echo ; echo ; echo "Aborted." ; echo ; exit 0' INT
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echo "Syncing and sleeping 2 seconds." ; echo
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sync
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sleep 2
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if [[ "$fs" == "1" ]]; then
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echo "fstrim $pasta && sleep 2" ; echo
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fstrim $pasta
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sleep 2
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fi
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echo "This is readed from sector $lbab: "
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hdparm --read-sector $lbab /dev/nvme0n1
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pass=$(hdparm --read-sector $lbab /dev/nvme0n1 | grep "0000 0000 0000 0000")
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if [[ $pass == "" ]]; then
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echo "
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Trim failed...
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You should see only 0000 0000 0000 0000 ...
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"
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else
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echo "Success!!!"
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fi
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exit 0
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}
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function LUKSTEST {
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# Reference: https://unix.stackexchange.com/questions/85865/trim-with-lvm-and-dm-crypt#
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echo 1 > /proc/sys/vm/drop_caches
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cd $pasta
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echo "Creating a \"yes\" file."
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yes | dd iflag=fullblock bs=1M count=1 of=test-trim-by-desgua
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#position=`filefrag -s -v test-trim-by-desgua | grep "eof" | awk '{ print $3 }'`
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position=`filefrag -s -v test-trim-by-desgua | grep "eof" | sed 's| ||g ; s|.*255:|| ; s|\.\..*||'`
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[[ "$position" == "" ]] && echo "Could not find the position of the file. Are you on a LUKS on LVM?" && CLEAN;
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device=`df test-trim-by-desgua | grep "dev/" | awk '{ print $1 }'`
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yes=`dd bs=4096 skip=$position count=256 if=$device | hexdump -C`
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echo "In the next line you should see a pattern like:
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00000000 79 0a 79 0a 79 0a 79 0a 79 0a 79 0a 79 0a 79 0a |y.y.y.y.y.y.y.y.|
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$yes
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"
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if [[ "`echo "$yes" | grep "y.y.y"`" == "" ]]; then
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echo "The pattern could not be checked. Something went wrong. Exiting."
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CLEAN;
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else
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echo "Pattern confirmed."
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fi
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echo "Removing the temp file."
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rm test-trim-by-desgua
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echo "Syncing."
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sync
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sleep 1
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if [[ "$fs" == "1" ]]; then
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echo "fstrim -v $pasta && sleep 2" ; echo
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fstrim -v $pasta
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sleep 2
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fi
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# Drop cache
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echo 1 > /proc/sys/vm/drop_caches
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echo "In the next line you should **NOT** see a yes pattern like:
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00000000 79 0a 79 0a 79 0a 79 0a 79 0a 79 0a 79 0a 79 0a |y.y.y.y.y.y.y.y.|
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If you see, then trim is not working:
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`dd bs=4096 skip=$position count=256 if=$device | hexdump -C`"
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yes=`dd bs=4096 skip=$position count=256 if=$device | hexdump -C`
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if [[ "`echo "$yes" | grep "y.y.y"`" != "" ]]; then
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echo "TRIM not working."
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else
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echo "TRIM is working!"
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fi
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CLEAN;
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}
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if [[ "$method" == "1" ]]; then
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SDATEST;
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TEST;
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elif [[ "$method" == "2" ]]; then
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LUKSTEST;
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fi
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exit 0
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