英文:
What is the filesystem UUID?
问题
文件系统UUID是什么？
我想知道文件系统UUID是如何使用的。
例如，在XFS中如果UUID重复，挂载将失败。
$ dmesg | tail
[345633.687773] XFS (sdc): Filesystem has duplicate UUID 4e6fb31f-a2c4-45a1-8502-63fdc0fd42e0 - can't mount
...
在其他文件系统（例如ext4、btrfs等）中是否应避免UUID重复？
英文:
What is the filesystem UUID?
I want to know how filesystem UUID is used.
For example, if duplicate UUID in xfs, mounting is failed.
$ dmesg | tail
[345633.687773] XFS (sdc): Filesystem has duplicate UUID 4e6fb31f-a2c4-45a1-8502-63fdc0fd42e0 - can't mount
...
Should UUID duplication be avoided on other filesystems(e.g. ext4, btrfs, etc...)?
答案1
得分: 1
以下是翻译好的部分：
"Here is a useful article explaining what UUID is and the problems it solves. In a nutshell, it's a universally unique identifier which allows administrators to distinguish between multiple filesystems in a Linux machine."
这里是一篇有用的文章，解释了UUID是什么以及它解决了什么问题。简而言之，它是一个“通用唯一标识符”，允许管理员区分Linux机器中的多个文件系统。
"> Should UUID duplication be avoided on other filesystems(e.g. ext4, btrfs, etc...)?"
是的，无论文件系统类型如何，都应避免UUID的重复。
"For XFS, the following command can be used to regenerate the UUID of an XFS filesystem:
xfs_admin -U generate /dev/sdc
Running this command should show you the new UUID. Edit /etc/fstab, then you should be good to go."
对于XFS，可以使用以下命令重新生成XFS文件系统的UUID：
xfs_admin -U generate /dev/sdc
运行此命令应该会显示新的UUID。然后编辑/etc/fstab，然后您就可以继续了。
英文:
Here is a useful article explaining what UUID is and the problems it solves. In a nutshell, it's a universally unique identifier which allows administrators to distinguish between multiple filesystems in a Linux machine.
> Should UUID duplication be avoided on other filesystems(e.g. ext4,
> btrfs, etc...)?
Yes, UUID's should be unique, no matter what the filesystem type is.
For XFS, the following command can be used to regenerate the UUID of an XFS filesystem:
xfs_admin -U generate /dev/sdc
Running this command should show you the new UUID. Edit /etc/fstab, then you should be good to go.
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