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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 3 weeks ago* (last edited 3 weeks 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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[–] amju_wolf@pawb.social 1 points 3 weeks ago (1 children)

The startup is absolutely more stressful for the motor. It's a period of high current that also creates hotspots in the windings and such. It's certainly not great for the motor.

[–] MangoPenguin@lemmy.blahaj.zone 1 points 3 weeks ago

Hotspots won't hurt anything unless they get too hot and damage the coating on the windings, I would assume the manufacturer is aware of that and designed the startup current so it's safe.