用vi 编辑了一个数据文件 ，导致下面的错误：
RMAN> validate datafile 5;
Starting validate at 2015-06-29 22:26:23
using channel ORA_DISK_1
channel ORA_DISK_1: starting validation of datafile
channel ORA_DISK_1: specifying datafile(s) for validation
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of validate command on ORA_DISK_1 channel at 06/29/2015 22:26:23
ORA-01122: database file 5 failed verification check
ORA-01110: data file 5: '/export/11g/oradata/orcl/example01.dbf'
ORA-01565: error in identifying file '/export/11g/oradata/orcl/example01.dbf'
ORA-27046: file size is not a multiple of logical block size
Additional information: 1
RMAN> validate dat
