Run hdparm as follows, to measure the READ speed of a storage drive device /dev/sda: $ sudo hdparm -Tt /dev/sda On CentOS, RHEL: $ sudo yum install hdparm On Linux Mint, Ubuntu, Debian: $ sudo apt-get install hdparm

It can be easily done from the Linux command line! Read more → Install hdparm depending on your Linux distribution.Ĭool Tip: Troubleshooting an issue with a hard drive performance? It will be a good idea also to test download/upload Internet speed. Hdparm is available from standard repositories on the most Linux distributions. Hdparm is a Linux command line utility that allows to set and view hardware parameters of hard disk drives.Īnd it can also be used as a simple benchmarking tool that allows to quickly find out the READ speed of a disk. hdparm: Test HDD, SSD, USB Flash Drive’s Performance Don’t forget to delete it when you complete the tests. Reminder: All the above commands use the temporary file tempfile. Or you can replace tempfile with the path to your mount point e.g.: $ sync dd if=/dev/zero of=/media/user/MyUSB/tempfile bs=1M count=1024 sync To check the performance of some External HDD, SSD, USB Flash Drive or any other removable device or remote file-system, simply access the mount point and repeat the above commands. $ dd if=tempfile of=/dev/null bs=1M count=1024ġ073741824 bytes (1.1 GB) copied, 2.27431 s, 472 MB/s dd: TEST Read/Write Speed of an External DriveĬool Tip: Have added a new drive to /etc/fstab? No need to reboot! Mount it with one command! Read more → Run the following command to find out the READ speed from buffer: $ dd if=tempfile of=/dev/null bs=1M count=1024ġ073741824 bytes (1.1 GB) copied, 0.159273 s, 6.7 GB/sĬlear the cache and accurately measure the real READ speed directly from the disk: $ sudo /sbin/sysctl -w vm.drop_caches=3 To get the real speed, we have to clear cache. The file tempfile, that has just been created by the previous command, was cached in a buffer and its read speed is much higher then the real read speed directly from the disk. Run the following command to test the WRITE speed of a disk: $ sync dd if=/dev/zero of=tempfile bs=1M count=1024 syncġ073741824 bytes (1.1 GB) copied, 3.28696 s, 327 MB/s dd: TEST Disk READ Speed To get the accurate read/write speed, you should repeat the below tests several times (usually 3-5) and take the average result.Ĭool Tip: How to choose SSD with the best quality/price relation! Read more → dd: TEST Disk WRITE Speed I’ll also show how to install and use hdparm utility for measuring read speed of a disk on Linux Mint, Ubuntu, Debian, CentOS, RHEL.

I’ll show how to test the read/write speed of a disk from the Linux command line using dd command. From this article you’ll learn how to measure an input/output performance of a file system on such devices as HDD, SSD, USB Flash Drive etc.

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