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How to check if Large File Size (LFS) is enabled

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Article ID: 37
by: Reese K.
Posted: 15 May, 2012
Last updated: 15 May, 2012
Views: 2653

To check if a file system supports the LFS standard, you can use the getconf command.  If the result is 64, LFS is supported.

getconf FILESIZEBITS /

In the example above, the root file system was checked.  If /var for example, is a separate file system, specify /var in its place.  You may also use the 'mount' command to verify the file system type that is being used.  ext2 / ext3, for example, has full support for LFS.

I found this nice read take from suse.de

Kernel 2.6: For both 32-bit systems with option CONFIG_LBD set and for 64-bit systems: The size of a file system is limited to 273 (far too much for today). On 32-bit systems (without CONFIG_LBD set) the size of a file is limited to 2 TiB. Note that not all filesystems and hardware drivers might handle such large filesystems.

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