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Red Hat Enterprise Linux 8 Essentials Book now available.

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9.2. Mounting an XFS File System

An XFS file system can be mounted with no extra options, for example:
mount /dev/device /mount/point
XFS also supports several mount options to influence behavior.
By default, XFS allocates inodes to reflect their on-disk location. However, because some 32-bit userspace applications are not compatible with inode numbers greater than 232, XFS will allocate all inodes in disk locations which result in 32-bit inode numbers. This can lead to decreased performance on very large filesystems (i.e. larger than 2 terabytes), because inodes are skewed to the beginning of the block device, while data is skewed towards the end.
To address this, use the inode64 mount option. This option configures XFS to allocate inodes and data across the entire file system, which can improve performance:
mount -o inode64 /dev/device /mount/point

Write Barriers

By default, XFS uses write barriers to ensure file system integrity even when power is lost to a device with write caches enabled. For devices without write caches, or with battery-backed write caches, disable barriers using the nobarrier option, as in:
mount -o nobarrier /dev/device /mount/point
For more information about write barriers, refer to Chapter 17, Write Barriers.

 
 
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