Check if you partition are aligned

fdisk -l /dev/sda | grep -E sda[0-9]+ | sed s/*// | awk '{printf ("%s %f ",$1,$2/512); if($2%512){ print "BAD" }else {print "Good"} }' | column -t
To get most of you HDD/SSD driver you need to make sure you partition are aligned, if not the speed penalty can be up to 50% slower! this simple one liner will check to see if each partition start sector is divided by 512 you need to change sda with your driver if you find the one of your partitions is not aligned use gparted to move the start sector of the partition to be divided of 512
Sample Output
/dev/sda1  4.000000        Good
/dev/sda2  404.000000      Good
/dev/sda3  160404.000000   Good
/dev/sda4  1520004.000000  Good
/dev/sda5  1520008.000000  Good
/dev/sda6  1521988.000000  Good
/dev/sda7  1643216.000000  Good
/dev/sda8  1659220.000000  Good
/dev/sda9  1787472.000000  Good

What Others Think

in order for this to work in centos/opensuse/rhel, i needed to use fdisk -lu
emjaydee · 292 weeks and 6 days ago

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Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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