rman备份时遇到以下报错：
channel c4 disabled, job failed on it will be run on another channel
RMAN-03009: failure of backup command on c5 channel at 11/18/2020 11:25:08
ORA-19504: failed to create file "/back/orcl/prod_arch1_28vfquok_1_1"
ORA-27054: NFS file system where the file is created or resides is not mounted with correct options
好的，在aix平台上编辑/etc/filesystems，加入以下
/back:
dev = "/dbbak"
vfs = nfs
nodename = 192.168.1.2
mount = true
options = rw,bg,hard,retry=1,rsize=32768,wsize=32768,timeo=600,vers=3,proto=tcp,sec=sys
account = false
重新mount
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