hdd power management

Asked by Nicolò Chieffo on 2009-02-13

Binary package hint: acpi-support

through the script 90-hdparm.sh you control the hard disk power management using hdparm -B. Why is hdparm -S not used? is this option dangerous?

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This question was originally filed as bug #329169.

Nicolò Chieffo,

Thank you for taking the time to report this, but after viewing this as a bug report I have to change it to a question.
Please continue reporting bugs.

Best Regards

Nicolò Chieffo (yelo3) said : #2

Yes sorry it's a question, but it will also be a bug if the answer is
"it's not dangerous"

 Nicolò Chieffo,

Hello hdparm -B is for advanced options. hdparm -S standby, spindown timeout of the drive.

hdparm -S is used by some people to correct the extra drive spinning is used for spindown.

hdparm -B is not use for spindown it for extra options for power setting 255 being the highest.

two very different options and either can be used just beware of uses.


No it's not really dangerous if you know the settings. what part of it is a bug?

Nicolò Chieffo (yelo3) said : #5

I'm wondering why acpi-support only uses the -B option. If -S is not
dangerous it should set it to a suggested default


Well there is a reason with higher end computers out there they seem to make it so they get the most power they can get.

so start it maxed out also for stress testing. You know you can adjust it to your like right? I see the bug report on it I personally don't take it as a bug seeing I can adjust it, but putting it to middle would be nice.

I see why a lot of people are having problems not every body is able to install Gnu/Linux Ubuntu, Fedora, Open Suse, etc and make it work the way the want.

But I believe they should make it part of the install and make a way to adjust with gui to adjust so it is optimized.
for laptop and desktops.

Best Regards,


The program options hdparm -B hdpard -S are completely different you know that right. They are not for the same thing.

I use both to configure my system spin down longer not to long hsparm -S 60 low so up it some a little trial and error. just be careful you can cause it to corrupt data.
And my power user hdparm -B 128 255 disabling it so 128 seems sweet for mine.

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