From owner-freebsd-questions@FreeBSD.ORG Fri Aug 22 17:33:46 2014 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id A725FC69 for ; Fri, 22 Aug 2014 17:33:46 +0000 (UTC) Received: from nk11p04mm-asmtp001.mac.com (nk11p04mm-asmtp001.mac.com [17.158.236.236]) (using TLSv1 with cipher DES-CBC3-SHA (168/168 bits)) (Client CN "smtp.me.com", Issuer "VeriSign Class 3 Extended Validation SSL SGC CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 8B8EB3EA3 for ; Fri, 22 Aug 2014 17:33:46 +0000 (UTC) Received: from [10.198.175.92] (mobile-166-147-083-045.mycingular.net [166.147.83.45]) by nk11p04mm-asmtp001.mac.com (Oracle Communications Messaging Server 7u4-27.10(7.0.4.27.9) 64bit (built Jun 6 2014)) with ESMTPSA id <0NAP006GFVBK6650@nk11p04mm-asmtp001.mac.com> for freebsd-questions@freebsd.org; Fri, 22 Aug 2014 16:33:39 +0000 (GMT) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.12.52,1.0.27,0.0.0000 definitions=2014-08-22_05:2014-08-22,2014-08-22,1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 suspectscore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=7.0.1-1402240000 definitions=main-1408220190 Content-type: text/plain; charset=us-ascii MIME-version: 1.0 (1.0) Subject: Re: solid state drives? From: "Peter A. Giessel" X-Mailer: iPhone Mail (11D257) In-reply-to: <20140822170112.69830ad9@gumby.homeunix.com> Date: Fri, 22 Aug 2014 08:33:18 -0800 Content-transfer-encoding: quoted-printable Message-id: References: <53F22E89.3050005@rcn.com> <53F2399D.5050609@hiwaay.net> <20140822170112.69830ad9@gumby.homeunix.com> To: RW Cc: "freebsd-questions@freebsd.org" X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 22 Aug 2014 17:33:46 -0000 > On Aug 22, 2014, at 8:01, RW wrote: >=20 > On Mon, 18 Aug 2014 12:36:29 -0500 > William A. Mahaffey III wrote: >=20 >=20 >> None of the SSD's are/will be as durable as spinning drives for >> writes .... That said, the SLC type are more durable than MLC or >> TLC .... Also more $$$$ & usually only available in smaller sizes. >> Good for a root drive, i.e. mostly read-olny operations. Swap & >> everything else on spinning platters .... >=20 > A typical modern 120GB MLC SSD will have a specified write endurance of > around 8TB which is equivalent to 1GB a day for 22 years. They should > be fine for most things where there's nothing doing heavy duty writing. >=20 This sounds about right. I've burned out (3) SSD drives in the last year, b= ut I'm pushing around 400-800 MB/s sustained random read/write 24/7 (about 4= 0GB/day) on a PCIe SSD drive.=