Re: Large msdosfs disk will not mount on RELENG_6

Rink Springer wrote:
On Mon, Nov 27, 2006 at 07:34:09AM +0100, Rink Springer wrote:
Looking at /sys/fs/msdosfs/msdosfs_vfsops.c seems to hint the existance
of options MSDOSFS_LARGE; this avoids the error message and will let you
mount the disk.

Oh, and before I forget: this option is defined in /sys/conf/NOTES as
well (a pure #ifdef in source code is not enough, of course :-)

---
# Experimental support for large MS-DOS filesystems.
#
# 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.
options MSDOSFS_LARGE
---

Regards,

It didn't occur to me to check NOTES, since this is on a very GENERIC box. I did check the man pages for both msdosfs and mount_msdosfs, as well as the "storage" chapter in the handbook. I didn't see this error message or that kernel option mentioned there.

Richard Coleman
rcoleman@xxxxxxxxxxxxxxxxx
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