From: Tejun Heo <tj@kernel.org>
To: Pavel Machek <pavel@ucw.cz>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>,
David Woodhouse <dwmw2@infradead.org>,
Hans de Goede <hdegoede@redhat.com>,
Ricard Wanderlof <ricard.wanderlof@axis.com>,
linux-scsi@vger.kernel.org, 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, 8 May 2017 13:43:03 -0400 [thread overview]
Message-ID: <20170508174303.GA12079@htj.duckdns.org> (raw)
In-Reply-To: <20170508164322.GA9781@amd>
Hello,
On Mon, May 08, 2017 at 06:43:22PM +0200, Pavel Machek wrote:
> What I was trying to point out was that storage people try to treat
> SSDs as HDDs... and SSDs are very different. Harddrives mostly survive
> powerfails (with emergency parking), while it is very, very difficult
> to make SSD survive random powerfail, and we have to make sure we
> always powerdown SSDs "cleanly".
We do.
The issue raised is that some SSDs still increment the unexpected
power loss count even after clean shutdown sequence and that the
kernel should wait for some secs before powering off.
We can do that for select devices but I want something more than "this
SMART counter is getting incremented" before doing that.
Thanks.
--
tejun
next prev parent reply other threads:[~2017-05-08 17:43 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
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 [this message]
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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