However I wish to change the disk from UUID booting (fstab) to the old
style LABEL.
(so I can export it and use on another machine).
however when I run:
e2label /dev/sda1 /
e2label: Bad magic number in super-block while trying to open /dev/sda1
Couldn't find valid filesystem superblock.
Three questions:
1) Am I doing something wrong?
2) Is there a better way?
3) How do I support VM formats (VBox, VHD and VMWare) easily?
Is this an xfs filesystem or an ext4 filesystem? I could be wrong, but I
suspect that e2label would only work on an ext2/3/4 filesystem. The
default filesystem in RHEL/CentOS 7 is xfs. It looks like you can check
labels on xfs filesystems with
xfs_admin -l </path/to/filesystem>
and you can set a label on an xfs filesystem with
xfs_admin -L "<your label>" </path/to/filesystem>
If you run "blkid" on your system it will give you all labels for all
disks connected to your machine for any filesystem types that it understands.
I don't think this has anything to do with physical or virtual disks or
virtual disk formats either. Here we are just talking abut filesystems.
Hope this helps.
Barry
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