hdparm is a performance and benchmarking tool for your hard disk (SATA/IDE).
official repositories. For use with SCSI devices, install .can be installed from the
To get information about your hard disk, run the following:
# hdparm -I /dev/sda
Reading speed MB/s
To measure how many MB/s your hard disk (SATA/IDE) can read, run the following:
# hdparm -t --direct /dev/sda
Writing speed MB/s
To measure how many MB/s your hard disk (SATA/IDE) can write, run the following:
$ sync;time bash -c "(dd if=/dev/zero of=bf bs=8k count=500000; sync)"
Do not forget to
rm bf after that.
bfis just the name of the output file that
Parking your hard drive
If your hard drive is clicking many times, the kernel is parking the hard drive's actuator arm (what moves the read/write head). This happens often on laptops (2.5" IDE hard drives). If it happens too often, it could damage your hard drive.
This will just park the reading head when you shut down the computer:
# hdparm -B254 /dev/sda
Default value is
-B128. An average value could be
-B199 if it is parking too often.
To make this persistent, add a udev rule by creating e.g.
ACTION=="add", SUBSYSTEM=="block", KERNEL=="sda", RUN+="/usr/bin/hdparm -B 254 /dev/sda"
Note that the APM level may get reset after a suspend, so you will probably also have to re-execute the command after each resume. That could be automated via a systemd resume@ service file.
Or you could create
/usr/lib/systemd/system-sleep/hdparm_set: found here
#!/bin/sh hdparm -B254 /dev/sda
And make it executable:
chmod +x /usr/lib/systemd/system-sleep/hdparm_set
Tips and tricks
KDE => 4.4.4 and hdparm
To stop KDE version 4.4.4 or greater from messing around with your (manually) configured hdparm values, enter the following and you should be done:
# touch /etc/pm/power.d/harddrive