Comment 3 for bug 159557

I also have problems mounting rw using NFS3, Gutsy client mounting from CentOS 5 NFS server.

fstab:
scaleo:/filer/temp /mnt/scaleo/temp nfs rw 0 0

sudo mount -a, check /etc/mtab:
scaleo:/filer/temp /mnt/scaleo/temp nfs rw,addr=<IP manually removed> 0 0

Can't write to /mnt/scaleo/temp, try checking with nfsstat -m:
/mnt/scaleo/temp from scaleo:/filer/temp
 Flags: ro,vers=3,rsize=32768,wsize=32768,hard,proto=tcp,timeo=600,retrans=2,sec=sys,addr=scaleo

Note "Flags: ro", according to mtab it's rw.

Tried the exact same setup from a CentOS client and it worked.

Added nfsvers=2 to fstab:
scaleo:/filer/temp /mnt/scaleo/temp nfs rw,nfsvers=2 0 0

Remounted, check mtab:
scaleo:/filer/temp /mnt/scaleo/temp nfs rw,nfsvers=2,addr=<IP manually removed> 0 0

And nfsstat -m:
/mnt/scaleo/temp from scaleo:/filer/temp
 Flags: rw,vers=2,rsize=8192,wsize=8192,hard,proto=tcp,timeo=600,retrans=2,sec=sys,addr=scaleo

Hey, now it's rw. Verified that I can write to the share, works.

Looks like there is a problem with NFSv3 in the Gutsy NFS client. Tried manually mounting (skipping fstab), same result.