Re: [Bug 219362] New: USB SATA does not correctly shutdown the SSD upon poweroff causing data loss

[Greg KH <gregkh@linuxfoundation.org>]

On Tue, Oct 08, 2024 at 11:43:02AM +0000, bugzilla-daemon@kernel.org wrote:
> I have SATA SSD drive connected via TUSB9261 converter. Eventualy i experience
> filesystem inconsistency when i repeatedly shutdown the device like this:
> 
> echo s > /proc/sysrq-trigger;
> echo u > /proc/sysrq-trigger;
> echo o > /proc/sysrq-trigger;

Don't do that, you will end up with an unstable system.  Please always
shutdown like normal.

> Same problem does not occur when i do this:
> 
> echo s > /proc/sysrq-trigger;
> echo u > /proc/sysrq-trigger;
> for i in /sys/block/*/device/delete; do echo 1 > "$i"; done;
> echo o > /proc/sysrq-trigger;

Yes, that is because you are shutting down things in the proper order,
like a normal shutdown will do.

sysrq is not for a normal shutdown, again, do not do that and expect to
have data saved properly.

good luck!

greg k-h