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we are running a couple of OS X clients in an open directory OS X server environment with home directories provide via NFS.

The auto_home script allows to mount the home folder of the user without changing the client, the directory util has two fields to setup the correct NFS mount:

NFSHomeDirectory: /home/testuser
HomeDirectory: <home_dir><url>nfs://SERVERNAME/Volumes/RAID/Users/testuser</url><path></path></home_dir>

On the clients the home directory is mounted and used correctly,

nfsstat -m

shows:

...
 NFS parameters: vers=3,tcp,port=2049,nomntudp,hard,nointr,noresvport,negnamecache,callumnt,locks,quota,rsize=32768,wsize=32768,readahead=16,dsize=32768,nordirplus,nodumbtimr,timeo=10,maxgroups=16,acregmin=5,acregmax=60,acdirmin=5,acdirmax=60,nomutejukebox,nonfc,sec=sys
...

which seems to use the OS X default NFS mount parameters.

Is there any way to configure those?

I'd like to change them to handle locks locally only and some other finetuning, but I don't find the correct way to configure the mount parameters.

1

You should be able to configure the default mount options that automountd applies using the AUTOMOUNTD_MNTOPTS option in /etc/autofs.conf.

Alternatively, for just the home directory mounts, you can add options to the auto_home map in /etc/auto_master.

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You can change the options in the Directory Utility

Command + Spacebar > Type and open 'Directory Utility' > Directory Editor > Viewing > Mounts > NFS mount > VFSOpts > Unlock the locker > Modify the options then save

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