From owner-freebsd-questions@FreeBSD.ORG Sat Feb 12 17:05:03 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 DE3BA106564A for ; Sat, 12 Feb 2011 17:05:03 +0000 (UTC) (envelope-from odhiambo@gmail.com) Received: from mail-qy0-f182.google.com (mail-qy0-f182.google.com [209.85.216.182]) by mx1.freebsd.org (Postfix) with ESMTP id 8B3948FC1C for ; Sat, 12 Feb 2011 17:05:03 +0000 (UTC) Received: by qyk36 with SMTP id 36so2491177qyk.13 for ; Sat, 12 Feb 2011 09:05:02 -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=5z69t++pMB6dv46DgG1GWwJH8iOSm8v4CdW6y6U1n9k=; b=DlHiCdI8Y3IqVzRvVtGfGvkXTO03oxqcSwfB6+UCeK3CBnD/PjaHoVXia8IpWgQGg3 i6rBcMK9/2iYBDtco1kao/t8kmst8FsQDY0ET8BKDmqyXFiYWKSxLhD3H/Bz2LCTjwAo 9atNDA34s12Cq7ZjcP/rHdh4BATS36hVXBZq8= 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=UTuOs0mDTWG7eqhN/MhXDvUqqXeNOg4oUkOVFSOtKA/OxEH/FwXAj1eQm+jGHBmMqI QvkTF3zTxtW+qXAPGaUVO7WaoM5umHRxiKU3VcYTNqUfDEzDNUrp2zyQSM2mNgO1VJ5x +0nFcPXbulOkS9ZHTHMfxDSJJvl7FC1BTSE+o= Received: by 10.229.89.78 with SMTP id d14mr1523306qcm.251.1297530302565; Sat, 12 Feb 2011 09:05:02 -0800 (PST) MIME-Version: 1.0 Received: by 10.229.88.9 with HTTP; Sat, 12 Feb 2011 09:04:32 -0800 (PST) In-Reply-To: <20110212165419.GA55168@orange.esperance-linux.co.uk> References: <4D550415.8060105@ifdnrg.com> <20110211185738.GB45708@guilt.hydra> <4D56799D.13036.2335C99A@dave.g8kbv.demon.co.uk> <20110212165419.GA55168@orange.esperance-linux.co.uk> From: Odhiambo Washington Date: Sat, 12 Feb 2011 20:04:32 +0300 Message-ID: To: Frank Shute Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: Adam Vande More , 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 17:05:03 -0000 On Sat, Feb 12, 2011 at 7:54 PM, Frank Shute wrote: > On Sat, Feb 12, 2011 at 07:12:08PM +0300, Odhiambo Washington wrote: > > > > 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?:) > > > > No you shouldn't but you should run FreeBSD on it ;) > With all the debate about FreeBSD this, FreeBSD that as regards SSDs, I am not sure if I should so this:-) I'll continue to run my FreeBSD servers on SATA-N.. > > There's a lot of FUD talked about SSDs. > > All I know is that I've been using one in my workstation for coming up to a > year with no problems so far. > > Take it from a mechanical engineer that SSDs are much more robust than > HDDs, which is one reason they (HDDs) are going the way of the dodo. > > I recommend that people should use SSDs for their workstations. Makes a big > difference in performance and makes the computer much more pleasant to work > on. > > These people in the know always talk about the imminent failure of SSDs soon:-) -- Best regards, Odhiambo WASHINGTON, Nairobi,KE +254733744121/+254722743223 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Damn!!