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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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[SOLVED] Cronjob with hdparm -y to spin down hard disks? (lemmy.ml)

submitted 1 day ago* (last edited 1 day ago) by gomp@lemmy.ml to c/linux@lemmy.ml

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Solution:
hd-idle is the way to go (if you read their README, they explain that most drives don't support idle timers)

I've been looking into spinning down the drives of my NAS, as I use it infrequently and that brings power drain down from ~30W to ~17W.

Problem is, hdparm -S doesn't seem to do anything for these particular drives: if I set it and wait for the appropriate amount of time (eg. 5 seconds if set to 1) the drives are still reported as "active/idle" and power drain doesn't go down.

Both hdparm -y and hdparm -Y work fine, but I don't seem to be able to find settings for them in tlp (probably because they are commands rather than settings?).

Besides the caveats about disks living longer if they are kept spinning, are there reasons why I shouldn't setup a cron job (well, a systemd timer) that runs hdparm -Y every 10 minutes? (for example, could hdparm -y cause errors if run while the drive is being backed up?)

PS: According to hdparm's manpage, -y puts the drive standby mode while -Y puts it into sleep mode. Considering that in my case power drain seems the same either way, should I prefer one or the other?

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[–] RootBeerGuy@discuss.tchncs.de 11 points 1 day ago (1 children)

I never got hdparm to work for me either. Hd-idle however works like a charm.

[–] ReversalHatchery@beehaw.org 5 points 1 day ago

hd-idle is the solution. it's strictly better than the HDDs own feature, because if you have some system monitoring software that queries your disk stats every minute, that will always reset that timer. hd-idle is smarter than that.