From owner-freebsd-questions@FreeBSD.ORG Sat Feb 12 16:12:49 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 03298106564A for ; Sat, 12 Feb 2011 16:12:49 +0000 (UTC) (envelope-from odhiambo@gmail.com) Received: from mail-qw0-f54.google.com (mail-qw0-f54.google.com [209.85.216.54]) by mx1.freebsd.org (Postfix) with ESMTP id A66818FC1C for ; Sat, 12 Feb 2011 16:12:48 +0000 (UTC) Received: by qwj9 with SMTP id 9so2170684qwj.13 for ; Sat, 12 Feb 2011 08:12:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc:content-type; bh=x4FBwoxjLEtO4BT67p/Fxwvdb5OkuCSkWeMQcx6ChcY=; b=je99IB2AylXo5eWPYAL2NIpuA74bXYHL8bS9ve3RQdvZkKhHQjtzhMwbpWUQeCqtsl pD07pPJ/cRqfKxFerKyK+0PxWFo36rcf6u4LcCYg+FuNq+3LWDImtofgDwJxqBoAFTVr pCdKwaxbhQUH4HIeu5Nqoq4Jj5HnGuOmzGFCI= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type; b=rNIAnMIJOGPH0fZgIM+h5v2fR29ZNphZEKWb+S0fCHlAxtNp4DdVgKTPXBkXqeiVJa K/sC877/KU8hfJpviSVSx2p4VR9N9PBMcbm6X/nD9GEMQbjgE3SUohe1uCgiRR1dXXeK TW2fXREhSnV7gzCYCHQ/3eZFn3kZaup6eyxxw= Received: by 10.229.237.6 with SMTP id km6mr1506820qcb.213.1297527158754; Sat, 12 Feb 2011 08:12:38 -0800 (PST) MIME-Version: 1.0 Received: by 10.229.88.9 with HTTP; Sat, 12 Feb 2011 08:12:08 -0800 (PST) In-Reply-To: References: <4D550415.8060105@ifdnrg.com> <20110211185738.GB45708@guilt.hydra> <4D56799D.13036.2335C99A@dave.g8kbv.demon.co.uk> From: Odhiambo Washington Date: Sat, 12 Feb 2011 19:12:08 +0300 Message-ID: To: Adam Vande More Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: Dave , freebsd-questions@freebsd.org Subject: Re: FreeBSD and SSD drives X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 12 Feb 2011 16:12:49 -0000 On Sat, Feb 12, 2011 at 6:50 PM, Adam Vande More wrote: > On Sat, Feb 12, 2011 at 6:14 AM, Dave wrote: > > > Define "a *lot*". If you look up the spec's on the common (currently) > > available SSD systems, it's only in the 10's of 1000's writes. Pittiful > > compared to magnetic media. > > > > Chances are on many setups, by the time you've written enough data to > significantly wear out the drive your magnetic media would died of > mechanical failure long before. Purchase what you need MLC/SLC. > > > > The way they work too, if you write one "sector" you actualy re-write a > > much larger block of memory. > > > Depends on full setup, the write amplification effect on the X-25's is > about > 1.1x. Recent SSD's all are much more efficient compared to when these were > large, legitimate concerns. > > > > Wear leveling, not that common with SSD > > Hard Drives, but very common with USB (Flash) memory sticks, > > > > Completely wrong even the first gen modern SSD's had wear leveling built > in. > > > > SSD's have a place, but not for things like swapfiles or working data > > that changes a lot.. > > > > I guess ZIL's wouldn't be a good use for such devices either. Perhaps you > can inform FS designers that they are doing it wrong. > > While my tech mind cannot comprehend all these arguments, there are laptops which come with SSD as primary drives and are running Windows or even Apple's OS X. I fail to understand why manufacturers would let people install SSDs on machines when their life is so much in question. Can someone please enlighten me on the dangers faced by those who opt to get their laptops installed with SSDs? I personally have one, with a Toshiba 128GB SSD (THNS128GG4BAAA-NonFDE). I am running Windows 7 on it. Should I stop and buy a SATA disk?:) -- Best regards, Odhiambo WASHINGTON, Nairobi,KE +254733744121/+254722743223 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Damn!!