How to make the disk spin down and stay spun down?
How to make the disk spin down and stay spun down? Currently, under Ubuntu 12.10 the disk will not spin down on its own and when forced to, spins up almost immediately? How do I keep it quiet?
**Basic info:**
# uname -a
Linux flax 3.5.0-18-generic #29-Ubuntu SMP Fri Oct 19 10:26:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 12.10
Release: 12.10
Codename: quantal
**What I have tried:**
I have enabled powersave for everything related to the disk I could find, extended the commit time and other tricks for ext4, tried forcing the disk to spin down with hdparm:
# cat /proc/mounts
[...]
/dev/mapper/
[...]
# cat /etc/fstab
[...]
/dev/mapper/
[...]
# cat /proc/sys/
5
# cat /proc/sys/
30000
# cat /proc/sys/
15
# cat /sys/class/
min_power
min_power
min_power
min_power
min_power
min_power
None of those seem to have any effect, the disk won't spin down (ever) and when forced to (# hdparm -y /dev/sda), comes back up very quickly, immediately after any write, actually. Though those changes do seem to make the jbd2 problem[1] a little better.
Now, I could chase down every single application that is writing to the disk, and turn it off, or stop it from writing. But that way, I may as well turn the computer off, the idea is to have the system hold on to the changes and write them down only once in a while, right? So how do I do it? What other info should I provide?
It's a Dell V131, certififed for Ubuntu[2].
[1] https:/
[2] http://
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