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Re: The "uniqueness" of UUIDs

From Roger Price <debian@rogerprice.org>
Newsgroups linux.debian.user
Subject Re: The "uniqueness" of UUIDs
Date 2024-11-26 10:10 +0100
Message-ID <JMZK1-bITN-3@gated-at.bofh.it> (permalink)
References <JMYXD-bIl2-1@gated-at.bofh.it> <JMZAl-bIAy-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Tue, 26 Nov 2024, Hans wrote:

> What about juste enter blkid as root?
> Will also give UUID and Label.

# blkid /dev/sdg6
/dev/sdg6: UUID="f5e37a29-357a-e3f2-c731-e29eddce5e91"
            UUID_SUB="8ae02b9d-d818-1d8a-88f6-5cb77b15d0eb"
            LABEL="10.218.0.100:3" TYPE="linux_raid_member" PARTUUID="000871f1-06"

# blkid /dev/sdh6
/dev/sdh6: UUID="f5e37a29-357a-e3f2-c731-e29eddce5e91"
            UUID_SUB="7821cc06-e7f5-358b-cf95-fb0ec2f34585"
            LABEL="10.218.0.100:3" TYPE="linux_raid_member" PARTUUID="0000b24f-06"

# blkid /dev/md0
/dev/md0: UUID="8a31b513-cd62-4639-b5e5-3a8f8879164f" BLOCK_SIZE="4096"
           TYPE="ext4"

The UUIDs are the same for sdg6 and sdh6 but there is a UUID_SUB to distinguish 
them.  blkid sees a new value for md0's UUID, not the same as lsblk.

Roger

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Thread

The "uniqueness" of UUIDs Roger Price <debian@rogerprice.org> - 2024-11-26 09:20 +0100
  Re: The "uniqueness" of UUIDs Hans <hans.ullrich@loop.de> - 2024-11-26 10:00 +0100
    Re: The "uniqueness" of UUIDs Roger Price <debian@rogerprice.org> - 2024-11-26 10:10 +0100
      Re: The "uniqueness" of UUIDs George at Clug <Clug@goproject.info> - 2024-11-26 10:40 +0100
  Re: The "uniqueness" of UUIDs Andy Smith <andy@strugglers.net> - 2024-11-26 16:30 +0100

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