Dell EMC Unity: Exportação NFSv4 - setfacl: Operação não compatível (corrigível pelo usuário)

[root@hostname xyz]# setfacl -m g:mygroup:r-x testfile
setfacl: testfile: Operation not supported

[root@hostname xyz]#apt-get install nfs4-acl-tools
[root@hostname xyz]#

[root@hostname xyz]#mount
192.168.1.14:/Test on /tmp/nfs type nfs4 (rw,relatime,vers=4.1,rsize=65536,wsize=65536,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=192.168.1.15,local_lock=none,addr=192.168.1.14)
[root@hostname xyz]#

 [root@hostname xyz]#nfs4_setfacl -R -a A:g:10001:rW /tmp/nfs

 [root@hostname xyz]#nfs4_getfacl /tmp/nfs
A:g:10001:rwaDtTNcCy
A:g:10001:rwaDtTNcCy
A:g:10001:rwaDtTNcCy
A::OWNER@:rwaDxtTnNcCy
A:g:GROUP@:rxtncy
A::EVERYONE@:rxtncy
 [root@hostname xyz]#