You may want to research this some more. Spinning the drive up and down adds wear on the mechanical parts, and will lead to the drive failing a lot sooner.
Maybe you're okay with that tradeoff, just thought you should at least be aware of it.
this post was submitted on 21 Jun 2023
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Checkout smartctl. You can either force shutdown immediately or after some idle time. Command is something like this:
smartctl -n -s standby,VALUE /dev/sda with value either "now" or something between 0 and 255. From the manpage:
Values from 1 to 240 specify timeouts from 5 seconds to 20 minutes in 5 second increments. Values from 241 to 251 specify timeouts from 30 minutes to 330 minutes in 30 minute increments. Value 252 specifies 21 minutes. Value 253 specifies a vendor specific time between 8 and 12 hours. Value 255 specifies 21 minutes and 15 seconds.
Value 252 specifies 21 minutes.
That's interestingly specific. Any idea why?
252 * 5 sec = 1260 sec or 21 min. I wonder what 254 does...
@Revan343 @Unimeron
The ATA specification takes the values that way. https://people.freebsd.org/~imp/asiabsdcon2015/works/d2161r5-ATAATAPI_Command_Set_-_3.pdf
Also, why is 255 21 minutes and 15 seconds? And why is there no 254?
If your only concern is noise (and not saving power), then the easiest solution is to just sound-proof your case - install some foam pads or something to dampen the noise. Check out https://www.quietpc.com/acousticmaterials to get an idea of what's out there and what you can use, but even simple random foam that you'd get in parcels would work to start off with.
Hdparm has 2 -(Yy) flags that should work for you
In fact I tried it and it did work, and I could create a script that does it automatically, the only problem is that how can I make the script detect that there are no processes that depend on the HDD?
If that's your goal I would set the apm on the disk so it spins down quickly when not active.
hdparm -B 50 -S 30 /dev/disk
The hdparm -B and -S options should allow you to have your drive automatically spin-down when inactive, but they don't work on all dives (eg. my NAS has two shucked WD white that seem to just ignore those settings). If those fail, you could schedule a hdparm -y to spin down the drive periodically.
Make sure to read man hdparm as there are some dangerous options.
PS: there's also https://github.com/adelolmo/hd-idle - I've not tried it out yet, but it seems promising
A HDD shouldn't make so much noise. I have a NAS with 4 drives, it produces almost no noise. I think that you have to check the SMART values of your drive. Just to make sure that your drive is not dying.
I think the fan in my Sabrent 4-bay drive enclosure is louder than the hard drives themselves.
Maybe you can unmount the HDD, then no process can access it and hd-idle could work.
I tried it and it didn't work... Thanks for the idea actually, I hadn't thought about it.