Messages in this thread | | | Date | Sun, 5 Jul 2020 18:31:25 -0300 | From | Henrique de Moraes Holschuh <> | Subject | Re: [PATCH] scsi: sd: stop SSD (non-rotational) disks before reboot |
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On Thu, 18 Jun 2020, Christoph Hellwig wrote: > > For SSDs, I don't think an extra stop should ever be an issue. > > Extra shutdowns will usually cause additional P/E cycles.
I am not so sure. We're talking about enforcing clean shutdowns here (from the SSD PoV).
A system reboot takes enough time that the SSD is likely to do about the same amount of P cycles commiting to FLASH any important data that it would trigger by a shutdown sequence, simply because it should not keep important data in RAM for too long. By extension, it would not increase E cycles either.
OTOH, unclean shutdowns *always* cause extra P/E, and that's if you're lucky enough for it to not cause anything much worse.
-- Henrique Holschuh
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