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Re: The "uniqueness" of UUIDs

From pocket@homemail.com
Newsgroups linux.debian.user
Subject Re: The "uniqueness" of UUIDs
Date 2024-11-26 13:20 +0100
Message-ID <JN2HT-bKHD-5@gated-at.bofh.it> (permalink)
References <JMJlT-buwd-3@gated-at.bofh.it> <JMRW9-bAG5-1@gated-at.bofh.it> <JMYEh-bHZp-9@gated-at.bofh.it>
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> Sent: Tuesday, November 26, 2024 at 2:51 AM
> From: "Roger Price" <debian@rogerprice.org>
> To: "debian-user Mailing List" <debian-user@lists.debian.org>
> Subject: The "uniqueness" of UUIDs
>
> On Tue, 26 Nov 2024, George at Clug wrote:
> 
> > "$ lsblk -f" output is very nice !   Thanks.
> 
> I tried this and noticed UUID duplication in the output.  Here is part of what I 
> saw:
> 
> NAME    FSTYPE            FSVER LABEL          UUID                                 FSAVAIL FSUSE% MOUNTPOINT
> ...
> sdg
> ... 
> ├─sdg6  linux_raid_member 1.0   10.218.0.100:3 f5e37a29-357a-e3f2-c731-e29eddce5e91 
> │ └─md3 ext4              1.0                  39c24711-ab43-497c-bf3e-12b4032575ac  758.4G     7% /mnt/home
> ...
> sdh
> ... 
> ├─sdh6  linux_raid_member 1.0   10.218.0.100:3 f5e37a29-357a-e3f2-c731-e29eddce5e91 
> │ └─md3 ext4              1.0                  39c24711-ab43-497c-bf3e-12b4032575ac  758.4G     7% /mnt/home
> 
> UUID sdg6 = UUID sdh6 !  If I wanted to retire /dev/sdg6 from the Raid array, I 
> would not be able to use the UUID, only the unique SDxn.
> 
> Aren't UUIDs supposed to be unique?  Roger
> 


/dev/sdb1: UUID="502aa1c4-77ec-04f2-5f9d-4f5db95ba570" UUID_SUB="7d10136a-cecd-603f-8f27-1fbb39adba5a" LABEL="alarm:Storage" TYPE="linux_raid_member" PARTUUID="11c13521-01"
/dev/sdc1: UUID="502aa1c4-77ec-04f2-5f9d-4f5db95ba570" UUID_SUB="e54cd488-9660-86af-a947-b13d645d1d4d" LABEL="alarm:Storage" TYPE="linux_raid_member"

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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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