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Re: Adding a new boot disk while keeping old disk

From Default User <hunguponcontent@gmail.com>
Newsgroups linux.debian.user
Subject Re: Adding a new boot disk while keeping old disk
Date 2024-11-25 20:10 +0100
Message-ID <JMMD7-bwSc-9@gated-at.bofh.it> (permalink)
References <JMBHI-bpPl-9@gated-at.bofh.it> <JMISS-bumx-1@gated-at.bofh.it> <JMKBk-bvce-5@gated-at.bofh.it> <JMLe1-bvO0-7@gated-at.bofh.it> <JMLxn-bvWR-11@gated-at.bofh.it>
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On Mon, 2024-11-25 at 18:59 +0100, tomas@tuxteam.de wrote:
> On Mon, Nov 25, 2024 at 12:36:55PM -0500, Default User wrote:
> 
> [...]
> 
> > Thomas, would you mind elaborating on, or give a link to an 
> > explanation of: 
> > 
> > "Of course, this UUID uniqueness thing starts looking ever more
> > flimsy once you start bit-copying file systems . . . "
> > 
> > I'm not sure I understand what bit-copying of file systems is, 
> > and why it would be flimsy.
> 
> It's more trivial than it seems. If you copy a whole file system
> bit-for-bit (e.g. with dd or similar), since the UUID is "in there",
> it travels along. Now you have two identical file systems with the
> same UUID.
> 
> If you now, for example, mount one and write things to it, you have
> two different file systems with the same UUID.
> 
> Cheers

--------------------

Okay, got it.
Thanks!

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Thread

Re: Adding a new boot disk while keeping old disk George at Clug <Clug@goproject.info> - 2024-11-25 08:30 +0100
  Re: Adding a new boot disk while keeping old disk eben@gmx.us - 2024-11-25 16:10 +0100
    Re: Adding a new boot disk while keeping old disk David Wright <deblis@lionunicorn.co.uk> - 2024-11-25 16:30 +0100
      Re: Adding a new boot disk while keeping old disk Felix Miata <mrmazda@stanis.net> - 2024-11-25 16:40 +0100
        Re: Adding a new boot disk while keeping old disk George at Clug <Clug@goproject.info> - 2024-11-26 01:50 +0100
          The "uniqueness" of UUIDs Roger Price <debian@rogerprice.org> - 2024-11-26 09:00 +0100
            Re: The "uniqueness" of UUIDs Nicolas George <george@nsup.org> - 2024-11-26 09:10 +0100
              Re: The "uniqueness" of UUIDs Nicolas George <george@nsup.org> - 2024-11-26 09:40 +0100
              Re: The "uniqueness" of UUIDs Roger Price <debian@rogerprice.org> - 2024-11-26 09:50 +0100
            Re: The "uniqueness" of UUIDs Felix Miata <mrmazda@stanis.net> - 2024-11-26 09:30 +0100
              Re: The "uniqueness" of UUIDs Roger Price <debian@rogerprice.org> - 2024-11-26 10:00 +0100
                Re: The "uniqueness" of UUIDs Nicolas George <george@nsup.org> - 2024-11-26 10:10 +0100
                Re: The "uniqueness" of UUIDs Roger Price <debian@rogerprice.org> - 2024-11-26 12:20 +0100
                Re: The "uniqueness" of UUIDs <tomas@tuxteam.de> - 2024-11-26 12:40 +0100
                Re: The "uniqueness" of UUIDs Nicolas George <george@nsup.org> - 2024-11-26 12:40 +0100
                Re: The "uniqueness" of UUIDs <tomas@tuxteam.de> - 2024-11-26 10:30 +0100
                Re: The "uniqueness" of UUIDs Nicolas George <george@nsup.org> - 2024-11-26 11:00 +0100
                Re: The "uniqueness" of UUIDs Felix Miata <mrmazda@stanis.net> - 2024-11-26 15:00 +0100
                Re: The "uniqueness" of UUIDs <tomas@tuxteam.de> - 2024-11-26 16:00 +0100
                Re: The "uniqueness" of UUIDs Roger Price <debian@rogerprice.org> - 2024-11-26 16:40 +0100
                Re: The "uniqueness" of UUIDs <tomas@tuxteam.de> - 2024-11-26 18:50 +0100
                Re: The "uniqueness" of UUIDs Michael Stone <mstone@debian.org> - 2024-11-27 18:00 +0100
                Re: The "uniqueness" of UUIDs Roger Price <debian@rogerprice.org> - 2024-11-26 16:00 +0100
            Re: The "uniqueness" of UUIDs Arno Lehmann <al@its-lehmann.de> - 2024-11-26 09:30 +0100
              Re: The "uniqueness" of UUIDs Arno Lehmann <al@its-lehmann.de> - 2024-11-26 10:50 +0100
            Re: The "uniqueness" of UUIDs <tomas@tuxteam.de> - 2024-11-26 09:50 +0100
            Re: The "uniqueness" of UUIDs pocket@homemail.com - 2024-11-26 13:20 +0100
      Re: Adding a new boot disk while keeping old disk eben@gmx.us - 2024-11-25 18:30 +0100
        Re: Adding a new boot disk while keeping old disk Hans <hans.ullrich@loop.de> - 2024-11-25 21:00 +0100
    Re: Adding a new boot disk while keeping old disk <tomas@tuxteam.de> - 2024-11-25 18:00 +0100
      Re: Adding a new boot disk while keeping old disk Default User <hunguponcontent@gmail.com> - 2024-11-25 18:40 +0100
        Re: Adding a new boot disk while keeping old disk <tomas@tuxteam.de> - 2024-11-25 19:00 +0100
          Re: Adding a new boot disk while keeping old disk Default User <hunguponcontent@gmail.com> - 2024-11-25 20:10 +0100
        Re: Adding a new boot disk while keeping old disk eben@gmx.us - 2024-11-25 23:40 +0100
          Re: Adding a new boot disk while keeping old disk Greg Wooledge <greg@wooledge.org> - 2024-11-26 00:00 +0100
            Re: Adding a new boot disk while keeping old disk Felix Miata <mrmazda@stanis.net> - 2024-11-26 00:30 +0100
      Re: Adding a new boot disk while keeping old disk Max Nikulin <manikulin@gmail.com> - 2024-11-26 03:40 +0100

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