错误：
[root@011 mfs]# mfsmaster start
open files limit has been set to: 16384
working directory: /usr/local/mfs/var/mfs
lockfile created and locked
initializing mfsmaster modules ...
meta option ignored: alldirs
meta option ignored: maproot=0
exports file has been loaded
topology file has been loaded
loading metadata ...
can't find metadata.mfs - try using option '-a'
init: metadata manager failed !!!
error occurred during initialization - exiting解决办法：
cd /usr/local/mfs/var/mfs/
mv metadata.mfs.back metadata.mfs