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Re: Selling iMac - Securing the disk

From nospam <nospam@nospam.invalid>
Newsgroups comp.sys.mac.system
Subject Re: Selling iMac - Securing the disk
Date 2013-10-17 20:53 -0400
Organization A noiseless patient Spider
Message-ID <171020132053411930%nospam@nospam.invalid> (permalink)
References <Kradne9qtqI9AcDPnZ2dnUVZ_rqdnZ2d@giganews.com> <l3kgqn$f92$1@reader1.panix.com> <YcydnfJJIYkKwf3PnZ2dnUVZ_rqdnZ2d@giganews.com> <5260654f$0$10189$c3e8da3$9b4ff22a@news.astraweb.com>

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In article <5260654f$0$10189$c3e8da3$9b4ff22a@news.astraweb.com>, JF
Mezei <jfmezei.spamnot@vaxination.ca> wrote:

> On 13-10-17 17:54, Alan Browne wrote:
> 
> > So I took it out of FV2 status and it promptly decrypted what I assume 
> > is the entire drive - it took about 12 hours. 
> 
> 
> It's interesting that the functionality of true formating of a disk
> drive was taken out and rarely seen anymore.  Perhaps because it now
> takes too long to format disks that are so big.

it was never taken out.

formatting has always meant wiping the directory. 

'low level' formatting is a misused term and done at the factory (and
can only be done at the factory). what people call low level formatting
is zeroing all sectors.

there is no way to low level format a drive outside of the factory. the
commands to do so are not there. 

> I am surprised that Disk Utility wouldn't let you zap a filevault drive.
> Did you try to click on the physical device instead of the volume ?

why are you surprised?

if it let you do that, people would be formatting encrypted drives
because they aren't readable without the key.

> I suspect line command tools would have had options to zap contents
> without having to first decrypt the drive.

they do. someone who knows enough to do it via the command line should
know what they're doing.

> And if you had deleted all files from the drive, I would have thought
> that decryoption would have beeen quite fast since it would have only
> been the disk/volume headers that needed to be decrypted.

the encryption is not file based and the number of files do not matter.

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Thread

Selling iMac - Securing the disk Alan Browne <alan.browne@FreelunchVideotron.ca> - 2013-10-15 15:50 -0400
  Re: Selling iMac - Securing the disk billy@MIX.COM - 2013-10-15 22:49 +0000
    Re: Selling iMac - Securing the disk George Kerby <ghost_topper@hotmail.com> - 2013-10-15 18:00 -0500
    Re: Selling iMac - Securing the disk Your Name <YourName@YourISP.com> - 2013-10-16 13:34 +1300
    Re: Selling iMac - Securing the disk Alan Browne <alan.browne@FreelunchVideotron.ca> - 2013-10-17 17:54 -0400
      Re: Selling iMac - Securing the disk JF Mezei <jfmezei.spamnot@vaxination.ca> - 2013-10-17 18:31 -0400
        Re: Selling iMac - Securing the disk Alan Browne <alan.browne@FreelunchVideotron.ca> - 2013-10-17 19:57 -0400
          Re: Selling iMac - Securing the disk dempson@actrix.gen.nz (David Empson) - 2013-10-18 13:03 +1300
            Re: Selling iMac - Securing the disk Alan Browne <alan.browne@FreelunchVideotron.ca> - 2013-10-17 20:51 -0400
          Re: Selling iMac - Securing the disk nospam <nospam@nospam.invalid> - 2013-10-17 20:53 -0400
        Re: Selling iMac - Securing the disk nospam <nospam@nospam.invalid> - 2013-10-17 20:53 -0400
          Re: Selling iMac - Securing the disk JF Mezei <jfmezei.spamnot@vaxination.ca> - 2013-10-18 00:27 -0400
            Re: Selling iMac - Securing the disk nospam <nospam@nospam.invalid> - 2013-10-18 03:09 -0400
      Re: Selling iMac - Securing the disk dempson@actrix.gen.nz (David Empson) - 2013-10-18 12:30 +1300
        Re: Selling iMac - Securing the disk Alan Browne <alan.browne@FreelunchVideotron.ca> - 2013-10-17 20:03 -0400
        Re: Selling iMac - Securing the disk nospam <nospam@nospam.invalid> - 2013-10-17 20:53 -0400
          Re: Selling iMac - Securing the disk dempson@actrix.gen.nz (David Empson) - 2013-10-18 16:01 +1300
            Re: Selling iMac - Securing the disk nospam <nospam@nospam.invalid> - 2013-10-17 23:42 -0400
      Re: Selling iMac - Securing the disk Erik <spam@this.com> - 2013-10-17 17:27 -0700
        Re: Selling iMac - Securing the disk Alan Browne <alan.browne@FreelunchVideotron.ca> - 2013-10-17 20:50 -0400
      Re: Selling iMac - Securing the disk nospam <nospam@nospam.invalid> - 2013-10-17 20:53 -0400
  Re: Selling iMac - Securing the disk Erik <spam@this.com> - 2013-10-15 18:59 -0700
    Re: Selling iMac - Securing the disk jamiekg@wizardling.geek.nz (Jamie Kahn Genet) - 2013-10-16 15:33 +1300
      Re: Selling iMac - Securing the disk George Kerby <ghost_topper@hotmail.com> - 2013-10-18 13:08 -0500
        Re: Selling iMac - Securing the disk Erik <spam@this.com> - 2013-10-18 12:06 -0700
          Re: Selling iMac - Securing the disk Your Name <YourName@YourISP.com> - 2013-10-19 10:17 +1300

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