oracle 12c 通过nfs备份报错：ORA-17500: ODM err:Communication error on send

[caogenzale]

nfs 共享参数：(rw,sync,all_squash,insecure,anonuid=0,anongid=0)

Recovery Manager: Release 12.1.0.1.0 - Production on Tue Nov 10 11:14:29 2015

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RMAN>
connected to target database: DBARAC (DBID=1442760657)

RMAN>
database is already started

RMAN> 2> 3> 4> 5>
using target database control file instead of recovery catalog
allocated channel: c1
channel c1: SID=80 instance=dbarac1 device type=DISK

Starting backup at 10-NOV-15
channel c1: starting datafile copy
input datafile file number=00001 name=+DATA/DBARAC/DATAFILE/system.259.894985883
released channel: c1
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of backup command on c1 channel at 11/10/2015 11:14:33
ORA-19504: failed to create file "/home/oracle/cdp/sourcemount/backup/data_D-DBARAC_I-1442760657_TS-SYSTEM_FNO-1_2oqlthko.dbf"
ORA-17502: ksfdcre:3 Failed to create file /home/oracle/cdp/sourcemount/backup/data_D-DBARAC_I-1442760657_TS-SYSTEM_FNO-1_2oqlthko.dbf
ORA-17500: ODM err:Communication error on send

补充说明，最开始备份出现这个问题共享中加入insecure 参数，然后可以解决，但是后来发现备份完卸载nfs，再挂载再备份就还有这个问题，除非重启数据库这个问题解决了，是否和DNFS有关？因为发现及时nfs server重启，端口改变了，v$dnfs_servers 中nfs server的端口还是不变，如何手动清理v$dnfs_servers？

[caogenzale]

自己顶，求大神帮助。

[好记忆不如烂笔头abc]

https://martincarstenbach.wordpress.com/2014/07/09/setting-up-direct-nfs-on-oracle-12c/ The last step necessary is to enable dNFS: cd $ORACLE_HOME/lib make -f ins_rdbms.mk dnfs_on

[caogenzale]

引用 2 楼 jycjyc 的回复:

https://martincarstenbach.wordpress.com/2014/07/09/setting-up-direct-nfs-on-oracle-12c/ The last step necessary is to enable dNFS: cd $ORACLE_HOME/lib make -f ins_rdbms.mk dnfs_on

能否稍微详细说下，既然dnfs已经启动为啥还有make这个？