From: David Woodhouse <dwmw2@infradead.org>
To: Ricard Wanderlof <ricard.wanderlof@axis.com>
Cc: Pavel Machek <pavel@ucw.cz>, Tejun Heo <tj@kernel.org>,
boris.brezillon@free-electrons.com, linux-scsi@vger.kernel.org,
Hans de Goede <hdegoede@redhat.com>,
linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org,
linux-mtd@lists.infradead.org,
Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Subject: Re: Race to power off harming SATA SSDs
Date: Mon, 08 May 2017 09:54:33 +0100 [thread overview]
Message-ID: <1494233673.6528.28.camel@infradead.org> (raw)
In-Reply-To: <alpine.DEB.2.11.1705081034420.6882@lnxricardw1>
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On Mon, 2017-05-08 at 10:36 +0200, Ricard Wanderlof wrote:
> On Mon, 8 May 2017, David Woodhouse wrote:
> > Our empirical testing trumps your "can never happen" theory :)
>
> I'm sure it does. But what is the explanation then? Has anyone analyzed
> what is going on using an oscilloscope to verify relationship between
> erase command and supply voltage drop?
Not that I'm aware of. Once we have reached the "it does happen and we
have to cope" there was not a lot of point in working out *why* it
happened.
In fact, the only examples I *personally* remember were on NOR flash,
which takes longer to erase. So it's vaguely possible that it doesn't
happen on NAND. But really, it's not something we should be depending
on and the software mechanisms have to remain in place.
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next prev parent reply other threads:[~2017-05-08 8:54 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-10 23:21 Race to power off harming SATA SSDs Henrique de Moraes Holschuh
2017-04-10 23:34 ` Bart Van Assche
2017-04-10 23:50 ` Henrique de Moraes Holschuh
2017-04-10 23:49 ` sd: wait for slow devices on shutdown path Henrique de Moraes Holschuh
2017-04-10 23:52 ` Race to power off harming SATA SSDs Tejun Heo
2017-04-10 23:57 ` James Bottomley
2017-04-11 2:02 ` Henrique de Moraes Holschuh
2017-04-11 1:26 ` Henrique de Moraes Holschuh
2017-04-11 10:37 ` Martin Steigerwald
2017-04-11 14:31 ` Henrique de Moraes Holschuh
2017-04-12 7:47 ` Martin Steigerwald
2017-05-07 20:40 ` Pavel Machek
2017-05-08 7:21 ` David Woodhouse
2017-05-08 7:38 ` Ricard Wanderlof
2017-05-08 8:13 ` David Woodhouse
2017-05-08 8:36 ` Ricard Wanderlof
2017-05-08 8:54 ` David Woodhouse [this message]
2017-05-08 9:06 ` Ricard Wanderlof
2017-05-08 9:09 ` Hans de Goede
2017-05-08 10:13 ` David Woodhouse
2017-05-08 11:50 ` Boris Brezillon
2017-05-08 15:40 ` David Woodhouse
2017-05-08 21:36 ` Pavel Machek
2017-05-08 16:43 ` Pavel Machek
2017-05-08 17:43 ` Tejun Heo
2017-05-08 18:56 ` Pavel Machek
2017-05-08 19:04 ` Tejun Heo
2017-05-08 18:29 ` Atlant Schmidt
2017-05-08 10:12 ` David Woodhouse
2017-05-08 9:28 ` Pavel Machek
2017-05-08 9:34 ` David Woodhouse
2017-05-08 10:49 ` Pavel Machek
2017-05-08 11:06 ` Richard Weinberger
2017-05-08 11:48 ` Boris Brezillon
2017-05-08 11:55 ` Boris Brezillon
2017-05-08 12:13 ` Richard Weinberger
2017-05-08 11:09 ` David Woodhouse
2017-05-08 12:32 ` Pavel Machek
2017-05-08 9:51 ` Richard Weinberger
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