Dell EMCUnity - NFS v4 .ckpt access No Such File Or Directory

  
 In Unity, Customer has the option of accessing the .ckpt folder from NFS mount natively , however when attempting access the user may see the following error :

root@peeps-peepsiso ~]# mount unity201fs1:/PFS01 /mnt/unity201
[root@peeps-peepsiso ~]# df -h
Filesystem Size Used Avail Use% Mounted on
...
unity201fs1:/PFS01 1021G 299G 723G 30% /mnt/unity201
[root@peeps-peepsiso ~]# mount
...
unity201fs1:/PFS01 on /mnt/unity201 type nfs (rw,vers=4,addr=10.xx.xx.xx,clientaddr=10.xx.xx.xx)
[root@peeps-peepsiso ~]# cd /mnt/unity201/
[root@peeps-peepsiso unity201]# ls
### EMC Unity ThunderBird 1TB Thin FS ### Logs Public SSG_Imports Unity_TB_vVNX
...
[root@peeps-peepsiso unity201]# cd .ckpt
-bash: cd: .ckpt: No such file or directory

     The problem is relevant to NFS V4 mount only

Workaround:

 NFS v3 remount provides access to the .ckpt, FS can be remounted or mounted to alternative mountpoint as v3:
[showing remount example]
     
[root@peeps-peepsiso unity201]# cd ..
[root@peeps-peepsiso mnt]# umount unity201/
[root@peeps-peepsiso mnt]# mount -t nfs -o vers=3 unity201fs1:/PFS01 /mnt/unity201
[root@peeps-peepsiso mnt]# df -h
Filesystem Size Used Avail Use% Mounted on
...
unity201fs1:/PFS01 1021G 299G 723G 30% /mnt/unity201
[root@peeps-peepsiso mnt]# mount
...
unity201fs1:/PFS01 on /mnt/unity201 type nfs (rw,vers=3,addr=10.xx.xx.xx)
[root@peeps-peepsiso mnt]# cd unity201/
[root@peeps-peepsiso unity201]# ls
### EMC Unity ThunderBird 1TB Thin FS ### Logs Public SSG_Imports Unity_TB_vVNX
...
[root@peeps-peepsiso unity201]# cd .ckpt
[root@peeps-peepsiso .ckpt]# ls
2016_03_28_22.28.26_GMT 2016_06_04_08.00.03_GMT 2016_06_06_08.00.01_GMT 2016_06_08_08.00.02_GMT
2016_06_03_08.00.01_GMT 2016_06_05_08.00.01_GMT 2016_06_07_08.00.01_GMT 2016_06_09_08.00.02_GMT
[root@peeps-peepsiso .ckpt]#
    
Resolution : Permanent Fix will be introduced in the next version of Unity (Falcon)