Tuesday, January 30, 2018
Disabling HDD Spindown
Disabling HDD Spindown
Recently Ive noticed that my HDD stops and starts too frequently. Not only has this affect on performance (access time) but it has negative impact to its lifetime. So Ive turned off Advanced power management (APM) function.
Not all HDDs support APM. You can show information with hdparm -I /dev/sdX
With one simple command, you can adjust APM level:
hdparm -B255 -S180 /dev/sdX
This disables APM (-B255) and sets timeout for HDD spin down (-S180), which has no effect here because of disabled APM.
After this command, HDD wont spin down.
To make this changes permanent Ive created udev rule /etc/udev/rules.d/11-hdparm.rules, so the setting will apply after reboot:
ACTION=="add", SUBSYSTEM=="block", KERNEL=="sdb", RUN+="/usr/bin/hdparm -B255 -S180 /dev/sdb"
