[Bug 151631] "Synchronizing SCSI cache" fails during(and delays) reboot/shutdown

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=151631

icanrealizeum <icanrealizeum+bugzillakernelorg@gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |icanrealizeum+bugzillakerne
                   |                            |lorg@gmail.com

--- Comment #1 from icanrealizeum <icanrealizeum+bugzillakernelorg@gmail.com> ---
I tried one shutdown, and after the above it did shutdown, as expected,
however, on poweron, SSD was not detected by BIOS unless I did one ctrl+alt+del
from POST's attempt to boot from LAN, and this second time it was detected.
This happens usually after I powerdown from button(hold 4 sec) because I
imagine SSD is busy recovering from sudden-power-loss internally, so I can only
conclude that the kernel didn't safely powerdown the SSD(aside from the above
failure to flush cache). (Was definitely ok in 4.7.0-rc6-ga99cde4)

I did however have a debug.sh script in
/usr/lib/systemd/system-shutdown/debug.sh
which did these:
sync && sdparm --command=sync /dev/sda && sleep 1
mount -o remount,ro /
hdparm -F /dev/sda
hdparm -f /dev/sda
sleep 1

So in a way, that ssd cache was supposedly flushed regardless; and it doesn't
seem to me that something else ever tried to remount,rw or do writes after
this.

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