mount_msdosfs -o large?

Chris Whitehouse cwhiteh at
Sat Dec 20 17:47:25 UTC 2008

Wojciech Puchar wrote:
>> 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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