在测试操作系统删除文件恢复的时候，在恢复的时候，发现检查点在检查到数据文件版本不对的时候，会关闭实例
Read of datafile ‘/xx.dbf’ (fno 51) header failed with ORA-01208
Rereading datafile 51 header failed with ORA-01208
Errors in file /home/oracle/app/diag/rdbms/xx/trace/xx_ckpt_11824.trc:
ORA-63999: data file suffered media failure
ORA-01122: database file 51 failed verification check
ORA-01110: data file 51: ‘/xx.dbf’
ORA-01208: data file is an old version - not accessing current version
Errors in file /home/oracle/app/diag/rdbms/xx_11824.trc:
ORA-63999: data file suffered media failure
ORA-01122: database file 51 failed verification check
ORA-01110: data file 51: ‘/xxx.dbf’
ORA-01208: data file is an old version - not accessing current version
CKPT (ospid: 11824): terminating the instance due to error 63999
可以通过隐含参数：_datafile_write_errors_crash_instance调整
