From owner-freebsd-questions@freebsd.org Wed Jun 24 18:12:03 2015 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 8F36491642F for ; Wed, 24 Jun 2015 18:12:03 +0000 (UTC) (envelope-from galtsev@kicp.uchicago.edu) Received: from cosmo.uchicago.edu (cosmo.uchicago.edu [128.135.70.90]) by mx1.freebsd.org (Postfix) with ESMTP id 6D96A1ED2 for ; Wed, 24 Jun 2015 18:12:03 +0000 (UTC) (envelope-from galtsev@kicp.uchicago.edu) Received: by cosmo.uchicago.edu (Postfix, from userid 48) id 3FC65CB8C9D; Wed, 24 Jun 2015 13:12:02 -0500 (CDT) Received: from 128.135.70.2 (SquirrelMail authenticated user valeri) by cosmo.uchicago.edu with HTTP; Wed, 24 Jun 2015 13:12:02 -0500 (CDT) Message-ID: <34851.128.135.70.2.1435169522.squirrel@cosmo.uchicago.edu> In-Reply-To: <558AF04A.8090206@gmail.com> References: <5589E2F9.3070604@gmail.com> <861th1tdj3.fsf@WorkBox.Home> <20150624153643.GB43640@neutralgood.org> <46363.128.135.70.2.1435160477.squirrel@cosmo.uchicago.edu> <558AF04A.8090206@gmail.com> Date: Wed, 24 Jun 2015 13:12:02 -0500 (CDT) Subject: Re: hard drive problem From: "Valeri Galtsev" To: freebsd-questions@freebsd.org Reply-To: galtsev@kicp.uchicago.edu User-Agent: SquirrelMail/1.4.8-5.el5.centos.7 MIME-Version: 1.0 Content-Type: text/plain;charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Priority: 3 (Normal) Importance: Normal X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jun 2015 18:12:03 -0000 On Wed, June 24, 2015 1:00 pm, jd1008 wrote: > > > On 06/24/2015 09:41 AM, Valeri Galtsev wrote: >> On Wed, June 24, 2015 10:36 am, kpneal@pobox.com wrote: >>> On Wed, Jun 24, 2015 at 08:57:20AM -0500, Brandon J. Wandersee wrote: >>>> jd1008 writes: >>>> >>>>> does anyone have a way to unlock the master pword in >>>>> a recent WD 2TB 2.5" drive? >>>> "Master pword?" Is this a firmware-level encrypted drive? If so, no. A >>>> "reset" feature would defeat the purpose of having encryption in the >>>> first place. If the drive is self-encrypting you don't know the >>>> password, the drive's a brick. >>> My guess is that you can tell the drive to use a new password, but the >>> contents of the drive are lost. That's assuming a firmware-level >>> encryption. >>> >>> BTW, are there really 2TB _2.5"_ drives on the market? >> It may be an enclosure with two 1TB 2.5" drives either concatenated, or >> RAID0 thus presenting itself as 2 TB. Just a wild guess. >> >> Valeri > This one is actually a 4 platter drive, thus rather thick (15mm). > Goodby to 7.5mm 2.5" drives. Areal density has not reached the > quantum level yet :) Cool note! With magnetic domains in will not be quantum level though: it will be at least about a hundred of individual atoms involved into each individual magnetic domain. Bu I really like your comment! Oh, boy, I seemed to overestimate macroscopicity of physics here (IBM managed it on 12 atoms...): http://www.ibm.com/smarterplanet/us/en/smarter_computing/article/atomic_scale_memory.html > But from the technologists I know who are > and have worked at HD companies, I hear that mechanical drives > are totally on the way out as the the RAM and FLASH electronics > get every tinier and faster, and much more reliable and long lasting. > Holography, one might think, could be most dense way of packing information (of what we know today). Thanks for your brilliant comment! It made my day! Valeri ++++++++++++++++++++++++++++++++++++++++ Valeri Galtsev Sr System Administrator Department of Astronomy and Astrophysics Kavli Institute for Cosmological Physics University of Chicago Phone: 773-702-4247 ++++++++++++++++++++++++++++++++++++++++