问题：
RMAN-03009: failure of backup command on ORA_DISK_4 channel at 02/01/2008 08:58:07
ORA-19504: failed to create file "/mnt/saleslog_1_1915_20080201"
ORA-27054: NFS file system where the file is created or resides is not mounted with correct options
Additional information: 3


正确的选项为: -o rw,bg,hard,intr,proto=tcp,vers=3,rsize=32768,wsize=32768,timeo=600