[systemd-devel] Restart instantiated services after suspend

[Tom Gundersen]

On Tue, Nov 19, 2013 at 5:18 PM, Marcos Felipe Rasia de Mello
<marcosfrm at gmail.com> wrote:
> Hi folks,
>
> I am trying to disable HDDs power management in a systemd way (aka no
> shell scripts :)
>
> /etc/udev/rules.d/99-hdparm.rules
>
> SUBSYSTEM=="block", KERNEL=="sd*", ATTR{removable}=="0",
> TAG+="systemd", ENV{SYSTEMD_WANTS}+="hdparm@%k.service"
>
>
> /etc/systemd/system/hdparm at .service
>
> [Unit]
> Description=Set disk /dev/%I parameters
> ConditionFileIsExecutable=/usr/sbin/hdparm
>
> [Service]
> Type=oneshot
> RemainAfterExit=yes
> ExecStart=/usr/sbin/hdparm -B254 /dev/%I
>
>
> It works fine, but after the machine wakes up from suspend, I need
> that all hdparm at .service be run again. Is there a way to accomplish
> this?

Shouldn't the kernel preserve all such settings during suspend/resume?

-t