Heads up: SATA kernel change coming to rawhide with a (small) chance of disk corruption!
Hi All,
As part of: https://fedoraproject.org/wiki/Changes/ImprovedLaptopBatteryLife
I'm pushing a change to the Fedora Rawhide kernel to enable the new
med_power_with_dipm sata link powermanagement policy by default on
mobile Intel chipsets (Laptops, NuCs, etc.).
The good news about this change is that on laptops using a sata disk
it will typically save about 1W - 1.5W of power when the laptop is idle.
The bad news is that the min_power policy is known to cause data corruption
with some disks (has been reported with older sandisk ssds and some crucial
ssds). The new med_power_with_dipm sata lpm policy mirrors the default
Windows IRST lpm settings, so it should be safe to use, but the proof is
in the pudding.
I've done a blog post a while back asking users to test
this: https://hansdegoede.livejournal.com/18412.html and here is a list
of successfully tested systens + disks:
https://fedoraproject.org/wiki/Changes/ImprovedLaptopBatteryLife#How_To_Test
So far no problems have been reported but if you're running rawhide now
would be a good time to make sure your backups are in order before
upgrading to the next rawhide kernel.
TL;DR: The next rawhide kernel build contains SATA changes which _may_
cause disk corruption, they shouldn't, but please check your backups
before updating.
Regards,
Hans