I want to try mounting a folder with NFS - I set up the NFS sharing on a windows 2008 R2 server, specified hosts in the NFS permissions (by IP address) and mounted via /etc/fstab

it mounts, but when I try to list the folder, I get 'input/output error'

the owner/group on the local mount point look weird too?

drwx------ 2 4294967294 4294967294 4096 2011-02-10 19:15 data/

I mounted in /etc/fstab as:$ /media/data nfs soft,intr,rsize=8192,wsize=8192

What am I doing wrong?

3 Answers 3


The issue was on the Windows Server side and it could not map the unix account to AD.

This blog post+comments led me to the solution.



In the NFS settings in windows NFS Share settings, checking allow Unmapped users access radio box allows it to work.


UID/GID mapping can be messed up, but you could try and chown the mount to yourself

  • tried mounting with a specific gid/uid, didnt work. any other ideas?
    – pablo
    Feb 14, 2011 at 20:10
  • I meant mount as root, and then chown the mount to root
    – dyasny
    Feb 14, 2011 at 20:55
  • tried that no luck same issue.
    – pablo
    Feb 15, 2011 at 11:54
  • 1
    can you post how you configured the NFS in windows? especially the NFS share screenshots
    – dyasny
    Feb 15, 2011 at 13:32

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