From owner-freebsd-fs@FreeBSD.ORG Thu Feb 20 14:23:10 2014 Return-Path: Delivered-To: fs@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 59CA9BE9 for ; Thu, 20 Feb 2014 14:23:10 +0000 (UTC) Received: from mail1.multiplay.co.uk (mail1.multiplay.co.uk [85.236.96.23]) (using TLSv1 with cipher RC4-MD5 (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id E759F1673 for ; Thu, 20 Feb 2014 14:23:09 +0000 (UTC) Received: from r2d2 ([82.69.141.170]) by mail1.multiplay.co.uk (mail1.multiplay.co.uk [85.236.96.23]) (MDaemon PRO v10.0.4) with ESMTP id md50008447125.msg for ; Thu, 20 Feb 2014 14:23:01 +0000 X-Spam-Processed: mail1.multiplay.co.uk, Thu, 20 Feb 2014 14:23:01 +0000 (not processed: message from valid local sender) X-MDDKIM-Result: neutral (mail1.multiplay.co.uk) X-MDRemoteIP: 82.69.141.170 X-Return-Path: prvs=1128321063=killing@multiplay.co.uk X-Envelope-From: killing@multiplay.co.uk X-MDaemon-Deliver-To: fs@freebsd.org Message-ID: <65C4D81622BE4331A9DD9FE2A293B303@multiplay.co.uk> From: "Steven Hartland" To: "Tom Evans" , "Willem Jan Withagen" References: <5305F8B0.1060308@digiware.nl> <783388CA2911497B98479F1187F49915@multiplay.co.uk> <53060C89.8040500@digiware.nl> Subject: Re: What types of SSDs to use..... Date: Thu, 20 Feb 2014 14:23:04 -0000 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 Cc: fs@freebsd.org X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 Feb 2014 14:23:10 -0000 ----- Original Message ----- From: "Tom Evans" To: "Willem Jan Withagen" Cc: Sent: Thursday, February 20, 2014 2:19 PM Subject: Re: What types of SSDs to use..... > On Thu, Feb 20, 2014 at 2:09 PM, Willem Jan Withagen wrote: >> On 20-2-2014 14:06, Steven Hartland wrote: >>> The "disconnect" issue is generally related to Sandforce based devices. >>> >>> Its a lot better on later devices / firmware and does depend on the >>> controller / MB they are connected to. >> >> Any easy way to detect these? Or is it just a matter of reading the >> specsheets? Hoping that the controller chipset is mentioned. >> > > You can tell the old (SF-2000) chipset devices from their advertised > read and write speeds - read will be 500+MBs, write will be > 200-300MBs. This is because the "read speed" assumes you will be > reading compressible data. > > I would avoid SF based drives if you can, I have had horrific > experiences with OCZ Vertex 4 SSDs where they basically lock up if you > do non-sequential access. Having said that, there are two parts to it, > the controller and the firmware running on the controller; Intel SSDs > using SF controllers, like the Intel 530, don't have such a bad > reputation. > > Looking on wikipedia or tech review sites for a specific SSD should > let you know what controller it uses, if it is not listed in the tech > specs. I replaced my OCZ drives with Crucial M4, which use a Marvell > controller. OCZ avoid the older like the plage they are very unreliable, Crucial M4's have very slow for TRIM so would avoid them on that basis. In terms of manufactures, both Kingston and Corsair have very good support. Regards Steve ================================================ This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. In the event of misdirection, illegible or incomplete transmission please telephone +44 845 868 1337 or return the E.mail to postmaster@multiplay.co.uk.