mount_msdosfs -o large?

Wojciech Puchar wojtek at
Sat Dec 20 16:34:39 UTC 2008

> chrisw)
> %
> However I can't find anything about the large option in man pages for mount, 
> mount_msdosfs or fstab.
> Would this be suitable text to go in the -o options section of 
> mount_msdosfs(8)?
> large
> 	Mount a filesystem larger than 128gb
> WARNING: This uses at least 32 bytes of kernel memory (which is not
> reclaimed until the FS is unmounted) for each file on disk to map
> between the 32-bit inode numbers used by VFS and the 64-bit
> pseudo-inode numbers used internally by msdosfs. This is only
> safe to use in certain controlled situations (e.g. read-only FS
> with less than 1 million files).
> Since the mappings do not persist across unmounts (or reboots), these
> filesystems are not suitable for exporting through NFS, or any other
> application that requires fixed inode numbers.

please do sent-pr with that.

it is missing important part of manual.

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