I have a quad-cpu server running RHEL AS 3, Taroon that acts as an NFS server for some other machines. It had a 390 uptime when the problem occured. Essentially, the directory paths it serves out stopped working, attempting to mount the directory on two client boxes results in: box1# mount rhelas3_box:/share1 /mnt/share1 mount: RPC: Program not registered box2# mount rhelas3_box:/share2 /mnt/share2 mount: RPC: Program not registered My guess as to what happened is portmap died on the server and then the rpc commands could not be established between the server and the clients. The options used for the mount are as follows: rhelas3_box:/share1 /mnt/share1 nfs ro,tcp,nfsvers=3,rsize=8192,timeo=11,hard,intr,defaults rhelas3_box:/share2 /mnt/share2 nfs ro,tcp,nfsvers=3,rsize=8192,timeo=11,hard,intr,defaults On the server in /etc/exports, the shares are below: /mnt/share1 1.2.3.4(rw,no_root_squash,sync) /mnt/share2 1.2.3.4(rw,no_root_squash,sync) Is this more of a kernel issue or specifically the portmap daemon? I have not seen this error in the past where NFS mounts randomly die, disappear or fail to work. Other than checking the logs during the time of the failure, what is the best way to begin troubleshooting this issue? Thanks, Justin. -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subjecthttps://www.redhat.com/mailman/listinfo/redhat-list