Dec 14 16:07:52 mail2 kernel: nfs_notify_change: revalidate failed, error=-512
Dec 14 16:11:49 mail2 kernel: NFS: can't silly-delete crazy at loveyooseungjun.co.kr/.nfs009
fd2ed00010b60, error=-512
Dec 14 16:28:30 mail2 kernel: NFS: can't silly-delete godlovesarang at godsarang.co.kr/.nfs0
04d92ba00010b87, error=-512
Dec 14 16:29:04 mail2 kernel: nfs_notify_change: revalidate failed, error=-512
Dec 14 16:29:36 mail2 kernel: nfs_notify_change: revalidate failed, error=-512
  위의 메세지가 무슨에러인가요?
  /dev/sda1              7257904   2010980   4878236  29% /
/dev/sda5              1035660    421864    561188  43% /var
RAID:/data        105834556  48143200  52315208  48% /DATA
 누가 가르쳐주세요