Changing XFS File System Feature Options

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Changing XFS File System Feature Options

Use the xfs_admin command to update or change XFS file system features on an unmounted device.

The xfs_admin command can change feature options on an unmounted XFS file system. For example, you can:

Enable or disable other feature options such as bigtime and inobtcount.
Change the file system UUID
Change the file system label

For more information, see the mkfs_admin(8) manual page.

Note:

You can't change a mounted XFS file system.

View and apply a new label to the file system.
To display the existing label, run:
```
sudo xfs_admin -l /dev/sdb
```
To apply a new label, run:
```
sudo xfs_admin -L "VideoRecords" /dev/sdb
```
Note:

The label can be a maximum of 12 characters in length.
View, generate, or clear the UUID of the file system.
To display the existing UUID, run:
```
sudo xfs_admin -u /dev/sdb
```
To generate a new UUID, run:
```
sudo xfs_admin -U generate /dev/sdb
```
To clear the UUID altogether, run:
```
sudo xfs_admin -U nil /dev/sdb
```
Enable bigtime or inobtcount.
To enable bigtime on a file system formatted without this option, run:
```
sudo xfs_admin -O bigtime=1 /dev/sdb
```
To enable inobtcount on a file system formatted without this option, run:
```
sudo xfs_admin -O inobtcount=1 /dev/sdb
```