> 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