ORA-27054: NFS file system where the file is created or resides is not mounted with correct options

We have a created a NFS mountpoint using Isilon storage which is shared in HP-UX and Linux Cluster servers. Creating file is working fine and also datapump also works good.

But when we try to store oracle database file (Datafiles) we are receiving the error.

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## Error
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ORA-27054: NFS file system where the file is created or resides is not mounted with correct options

### Full Error

channel ORA_DISK_4: starting datafile copy
input datafile file number=00008 name=/ofa/u001/SIDNAME/oradata/datafiles1/SIDNAME_tbs_ts1_01.dbf
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of backup command on ORA_DISK_4 channel at 08/16/2016 23:46:02
ORA-19504: failed to create file "/nfs_mount_name/SIDNAME/bkp/tbs_TS1_8.tf"ORA-27054: NFS file system where the file is created or resides is not mounted with correct options
Additional information: 3
Additional information: 12

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#  Error Occurred
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Error occured while performing prepare phase using XTTS method in 11.2.0.4.0 version

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## Command Executed
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$ORACLE_HOME/perl/bin/perl xttdriver.pl -p

**************************************** Step By Step Analysis ******************************************************

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# 1) Check the file system mount Options
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cat "/etc/fstab"| grep -i mig

# cat "/etc/fstab"| grep -i mig
#----Oracle Migration-----
NASHOST:/ifs/nfspace /nfs_mount_name nfs defaults 0 0
#

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# 2) Reason for Failure
#########################################

The file system is mounted with the default options which will work for a normal file system usage. But to store oracle database datafiles, we need to add specific mount options.

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## Solution
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Update /etc/fstab with the below options for HP-UX servers.

rw,bg,vers=3,proto=tcp,noac,forcedirectio,hard,nointr,timeo=600,rsize=32768,wsize=32768

# cat "/etc/fstab"| grep -i mig
#----Oracle Migration-----
#NASHOST:/ifs/nfspace /nfs_mount_name nfs defaults 0 0
NASHOST:/ifs/nfspace /nfs_mount_name nfs rw,bg,vers=3,proto=tcp,noac,forcedirectio,hard,nointr,timeo=600,rsize=32768,wsize=32768 0 0#

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Unmount and Remount the File system. After the Prepare script worked good.
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# umount /nfs_mount_name
# mount /nfs_mount_name
# bdf /nfs_mount_name
Filesystem          kbytes    used   avail %used Mounted on
NASHOST:/ifs/nfspace
                   5368709120 2783611400 2585097720   52% /nfs_mount_name
# 

$ pwd
/nfs_mount_name/SIDNAME/bkp
$ ls -ltr
total 352044008
-rw-r-----   1 oracle     dba        10485768192 Aug 17 11:21 tbs_TS1_23.tf
-rw-r-----   1 oracle     dba        31457288192 Aug 17 11:37 tbs_TS1_9.tf
$

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 Comments Are Always welcome
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