cloud engineer
Here’s how to fix a duplicate UUID on a XFS file system.
mount -o rw,nouuid /dev/sda1 /data |
Mounting with nouuid will work, but not after a reboot.
To avoid a duplicate ID, run this command to generate a new UUID.
xfs_admin -U generate /dev/sda3 Clearing log and setting UUID writing all SBs new UUID = xxxxx-xxxx-xxxx-xxxxxxxxx |
File system command differences between ext3 and xfs.
| Task | ext4 | xfs |
| Creating a file system | mkfs.ext4 | mkfs.xfs |
| Mounting a file system | mount | mount |
| Resizing a file system | resize2fs | xfs_growfs |
| Repairing a file system | e2fsck | xfs_repair |
| Changing the label on a file system | e2label | xfs_admin -L |
| Reporting on disk space and file usage | quota | quota |
| Debugging a file system | debugfs | xfs_db |
| Saving critical file system metadata to a file | e2image | xfs_metadump |
Add a disk volume via cloud console. Then perform the following commands:
# check the new block lsblk # format fdisk /dev/sdc # create file system mkfs.xfs -f /dev/sdc1 # get uuid blkid /dev/sdc1 # vi /etc/fstab UUID="xxxxxxxxxxxxxxxxxxxxx" /mnt/directory xfs defaults 0 0 # mount mount -a |
When resizing disks, here are the commands for each respected file system.
For xfs:
xfs_growfs /dev/vgname/lgname |
For ext 2/3/4:
resize2fs /dev/vgname/lgname |