From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1d7qKS-0002hG-E2 for linux-mtd@lists.infradead.org; Mon, 08 May 2017 21:36:30 +0000 Date: Mon, 8 May 2017 23:36:05 +0200 From: Pavel Machek To: David Woodhouse Cc: Boris Brezillon , Hans de Goede , Ricard Wanderlof , Tejun Heo , linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org, linux-mtd@lists.infradead.org, Henrique de Moraes Holschuh Subject: Re: Race to power off harming SATA SSDs Message-ID: <20170508213605.GA12687@amd> References: <1494228094.6528.14.camel@infradead.org> <1494231215.6528.22.camel@infradead.org> <1494233673.6528.28.camel@infradead.org> <7ee84982-cfad-94d7-4e22-4edbeb852b32@redhat.com> <1494238390.6528.42.camel@infradead.org> <20170508135005.0b9b200b@bbrezillon> <1494258011.5407.18.camel@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1494258011.5407.18.camel@infradead.org> List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Mon 2017-05-08 16:40:11, David Woodhouse wrote: > On Mon, 2017-05-08 at 13:50 +0200, Boris Brezillon wrote: > > On Mon, 08 May 2017 11:13:10 +0100 > > David Woodhouse 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 :-). > > Well, maybe. But it was a silly thread in the first place. SATA SSDs > aren't *expected* to be reliable. Citation needed? I'm pretty sure SATA SSDs are expected to be reliable, up to maximum amount of gigabytes written (specified by manufacturer), as long as you don't cut power without warning. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html