From owner-freebsd-questions@FreeBSD.ORG Fri Dec 30 21:20:30 2011 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 3818D1065670 for ; Fri, 30 Dec 2011 21:20:30 +0000 (UTC) (envelope-from ufs.user@yahoo.com) Received: from nm32-vm5.bullet.mail.bf1.yahoo.com (nm32-vm5.bullet.mail.bf1.yahoo.com [72.30.239.141]) by mx1.freebsd.org (Postfix) with SMTP id CD1D78FC08 for ; Fri, 30 Dec 2011 21:20:29 +0000 (UTC) Received: from [98.139.212.148] by nm32.bullet.mail.bf1.yahoo.com with NNFMP; 30 Dec 2011 21:20:28 -0000 Received: from [98.139.212.198] by tm5.bullet.mail.bf1.yahoo.com with NNFMP; 30 Dec 2011 21:20:28 -0000 Received: from [127.0.0.1] by omp1007.mail.bf1.yahoo.com with NNFMP; 30 Dec 2011 21:20:28 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 906071.94186.bm@omp1007.mail.bf1.yahoo.com Received: (qmail 74860 invoked by uid 60001); 30 Dec 2011 21:20:28 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1325280028; bh=OSOmFVUgw6z+q+QMEVsotgTli7GMsT/fHVtWdJcw+iE=; h=X-YMail-OSG:Received:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:Cc:In-Reply-To:MIME-Version:Content-Type; b=iyLl7u1k7nnQiE9ZMuyJ/U+ka4YYJzNtfrTFiLbGlqSH5BM8PaM8o0jCyOnkciNt3mq3b+vrAy4lE5qewhCrnKhU8ss4xLv6zVcZO/4vH1YY2wsGN5rx7M823vzSmZTjN/pdXYV7Egcjn5kwtarVjDYOklEFwhk+VFGfzalKld4= DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:Cc:In-Reply-To:MIME-Version:Content-Type; b=wudtVar0N965Ug5gA/RbBF73owiLW+vTyFCR6QxTMkXQ2GqYQikH458ZQviZ+FLlMoM/rb+/bZ2/qwABnZ+Thjx83UvyizT+eEIrY91KeH7E1aSmwA8oPLFAn7+Y5EqTYdq1ILXmH6JRAjicpSx7m0bPvOpvlH4qYUcuGBKSVb0=; X-YMail-OSG: AXFi6wMVM1nAWIVoREKbEwdCwqduqsqUZ566.9lWlOiYDpq z5aWzEQcvJSnPPGQwbE2kL.skKfkDMCVCrplcry1LnehNzbDPhYU1NicUyYZ i1I2IzWBysg0.umNgJLgH4gLaCTXxKPZSCpOxzMi_GmcsbERu9eUeXY_cElS I3pu1SKEgpEZ01kAP8n0NZmbkr9W3SG5IQ3nidjr2FVzrNTL3xabZ7XZD57i pQzkJQybqpwlyFYJZJd3p_iuLpiFCjVKyaSR4qeL.ClTngwBBDLp.v6r4sU3 58DFY5fi56a1ORFsDlCogAMWRdqlPqaNagosmHtdmP0chWL2nhCwXPo8B6fI Q.9SjXaiHDIO76dzIIluwQSJ.ILWKBlDssF4ElKzQXnTmUe44jRTx5A9yOqy VJgxq6ljqYE0JTNGcWn6FblY_zeaZb5Ea6VaDWZ96PO3akehbKakGh0V31u0 iYlg86id7B1cgqc1of5Lf1sC65esZbD.mTg-- Received: from [64.134.127.137] by web140409.mail.bf1.yahoo.com via HTTP; Fri, 30 Dec 2011 13:20:28 PST X-Mailer: YahooMailWebService/0.8.115.331698 References: <1325229204.34713.YahooMailNeo@web140405.mail.bf1.yahoo.com> Message-ID: <1325280028.76835.YahooMailNeo@web140409.mail.bf1.yahoo.com> Date: Fri, 30 Dec 2011 13:20:28 -0800 (PST) From: UFS User To: Mehmet Erol Sanliturk In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: "freebsd-questions@freebsd.org" Subject: Re: Why do I feel like compact flash is more reliable than SSD ? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: UFS User List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 30 Dec 2011 21:20:30 -0000 On Fri, Dec 30, 2011 at 2:13 AM, UFS User wrote: >But everyone I know (including me) has had an SSD fail, usually with no explanation. > >So is this just chance, or ... are CF cards really a lot more reliable than SSD ? The following pages , and references in them , may be useful : http://en.wikipedia.org/wiki/Solid-state_drive http://en.wikipedia.org/wiki/Wear_leveling http://en.wikipedia.org/wiki/Write_amplification http://en.wikipedia.org/wiki/Category:Solid-state_computer_storage_media http://en.wikipedia.org/wiki/Category:Solid-state_computer_storage No, these aren't useful at all, and further, the previous response that compared SSDs to spinning disks was also irrelevant. I am asking why compact flash cards (which are flash) seem to be much, much more reliable and durable than SSD (which is also flash). Why do I have CF parts running for 8+ years all over the place, but everyone I know has had SSDs fail (including me) ? There is no mention of spinning hard disks here, nor is this about *how* flash degrades in general - because in this case, they're both flash. Further, the failures I am seeing with SSDs are not because they wore out - they just quit. Comments ?