Am 23.01.23 um 19:47 schrieb Genes Lists:
So the hardware just lies -
What a surprise. Disk firmware has been lying for ages.
Acknowledging write barriers or cache flushes early, to look good
in benchmarks, for instance.
perhaps they should just add a capacitor on
board with enough juice to finish the cache flush or something.
This has been done already. Look for disks with power-loss
protection. But these emergency flushes seem to come with
downsides too, because the firmware cares to count them and
report the counter as SMART attribute of type "Old_age".
Have you observed any ill effects?
Of what? Waiting two more seconds for power-off? No.
I am running some large arrays of rotating disks. Power-loss head
retract is certainly a factor for wear and totally avoidable. And
about SSDs? I do not know. Some people reported SSDs had been
bricked by sudden power-loss. I believe this happend to me some
years ago, but you never know why some hardware starts acting up.
Why take the risk? I could not care less about a machine needing
some seconds more to power off or reboot, compared to the
headache of changing drives and restoring from backup. Which is
never current, BTW. :-)
BR
