Is SATA ALPM safe with btrfs now (no more corruption)?

Is SATA ALPM safe with btrfs now (no more corruption)?

[Marc MERLIN]

TLP allows SATA power management: SATA_LINKPWR_ON_BAT=max_performance

There are some old posts that talk about corruption if you enable this
with btrfs:
https://wiki.archlinux.org/index.php/TLP#Btrfs
says not to enable it

https://forum.manjaro.org/t/btrfs-corruption-with-tlp/25158

https://github.com/linrunner/TLP/issues/128
says it may not be safe

https://www.reddit.com/r/archlinux/comments/5tm5uh/btrfs_and_tlp/
also talks about corruption

https://www.reddit.com/r/archlinux/comments/4f5xvh/saving_power_is_the_btrfs_dataloss_warning_still/
say it's probably ok

My feeling is that it's probably ok nowadays with a 5.6+ kernel.

Would anyone disagree?

Thanks,
Marc
-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
 
Home page: http://marc.merlins.org/  

Re: Is SATA ALPM safe with btrfs now (no more corruption)?

[David Sterba]

On Thu, May 28, 2020 at 09:26:15PM -0700, Marc MERLIN wrote:
> TLP allows SATA power management: SATA_LINKPWR_ON_BAT=max_performance
> 
> There are some old posts that talk about corruption if you enable this
> with btrfs:
> https://wiki.archlinux.org/index.php/TLP#Btrfs
> says not to enable it
> 
> https://forum.manjaro.org/t/btrfs-corruption-with-tlp/25158
> 
> https://github.com/linrunner/TLP/issues/128
> says it may not be safe
> 
> https://www.reddit.com/r/archlinux/comments/5tm5uh/btrfs_and_tlp/
> also talks about corruption
> 
> https://www.reddit.com/r/archlinux/comments/4f5xvh/saving_power_is_the_btrfs_dataloss_warning_still/
> say it's probably ok
> 
> My feeling is that it's probably ok nowadays with a 5.6+ kernel.
> 
> Would anyone disagree?

I don't and reading the posts, it's a hardware problem leading to
filesystem corruption. It's affecting all filesystem but the detection
capabilities differ, so it stuck with btrfs.

At least the Arch wiki note can be removed, I don't see any value
keeping it there, the fixes to ATA subsystem have been merged to 4.15.

Re: Is SATA ALPM safe with btrfs now (no more corruption)?

[Marc MERLIN]

On Mon, Jun 01, 2020 at 07:39:25PM +0200, David Sterba wrote:
> On Thu, May 28, 2020 at 09:26:15PM -0700, Marc MERLIN wrote:
> > TLP allows SATA power management: SATA_LINKPWR_ON_BAT=max_performance
> > 
> > There are some old posts that talk about corruption if you enable this
> > with btrfs:
> > https://wiki.archlinux.org/index.php/TLP#Btrfs
> > says not to enable it
> > 
> > https://forum.manjaro.org/t/btrfs-corruption-with-tlp/25158
> > 
> > https://github.com/linrunner/TLP/issues/128
> > says it may not be safe
> > 
> > https://www.reddit.com/r/archlinux/comments/5tm5uh/btrfs_and_tlp/
> > also talks about corruption
> > 
> > https://www.reddit.com/r/archlinux/comments/4f5xvh/saving_power_is_the_btrfs_dataloss_warning_still/
> > say it's probably ok
> > 
> > My feeling is that it's probably ok nowadays with a 5.6+ kernel.
> > 
> > Would anyone disagree?
> 
> I don't and reading the posts, it's a hardware problem leading to
> filesystem corruption. It's affecting all filesystem but the detection
> capabilities differ, so it stuck with btrfs.
> 
> At least the Arch wiki note can be removed, I don't see any value
> keeping it there, the fixes to ATA subsystem have been merged to 4.15.

Sorry, it looks like I never replied to you. Thanks for confirming my
guess.

Marc
-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
 
Home page: http://marc.merlins.org/                       | PGP 7F55D5F27AAF9D08