linux-kernel - Re: Race to power off harming SATA SSDs

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Message-ID: <20170508135005.0b9b200b@bbrezillon>
Date:   Mon, 8 May 2017 13:50:05 +0200
From:   Boris Brezillon <boris.brezillon@...e-electrons.com>
To:     David Woodhouse <dwmw2@...radead.org>
Cc:     Hans de Goede <hdegoede@...hat.com>,
        Ricard Wanderlof <ricard.wanderlof@...s.com>,
        Pavel Machek <pavel@....cz>, Tejun Heo <tj@...nel.org>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-ide@...r.kernel.org, linux-mtd@...ts.infradead.org,
        Henrique de Moraes Holschuh <hmh@....eng.br>
Subject: Re: Race to power off harming SATA SSDs

On Mon, 08 May 2017 11:13:10 +0100
David Woodhouse <dwmw2@...radead.org> wrote:

> On Mon, 2017-05-08 at 11:09 +0200, Hans de Goede wrote:
> > You're forgetting that the SSD itself (this thread is about SSDs) also has
> > a major software component which is doing housekeeping all the time, so even
> > if the main CPU gets reset the SSD's controller may still happily be erasing
> > blocks.  
> 
> We're not really talking about SSDs at all any more; we're talking
> about real flash with real maintainable software.

It's probably a good sign that this new discussion should take place in
a different thread :-).