过程

用参数拉起实例后，还原控制文件，数据库拉起到mount状态，catalog start with xx注册备份文件。

现象

执行catalog start with xx后，alert日志出现以下信息

Thu May 14 11:18:24 2020
Setting recovery target incarnation to 2
Setting recovery target incarnation to 2
Error validating file dummy (14) in piece xxx: missing header
Expanded controlfile section 14 from 245 to 490 records
Requested to grow by 245 recards; added 3 blocks of records

执行还原脚本出现以下报错后退出

ORA-01180: can not create datafile 1
ORA-01110: data file 1:  '+DATA/xxxx/datafile/system01.dbf'

解决过程

rman中查看incarnation

RMAN> list incarnation;

List of Database Incarnations
DB Key  Inc Key DB Name  DB ID            STATUS Reset SCN  Reset Time
------- ------- -------- ---------------- ------ ------------------ ----------
1       1       ORCL     1446008355       PARENT   1                2014/12/26 14:31:00
2       2       ORCL     1446008355       CURRENT  17034938503292   2020/05/09 17:34:36

重置incarnation回1

RMAN> reset database to incarnation 1;
database reset to incatnation 1

RMAN> list incarnation;

List of Database Incarnations
DB Key  Inc Key DB Name  DB ID            STATUS Reset SCN  Reset Time
------- ------- -------- ---------------- ------ ------------------ ----------
1       1       ORCL     1446008355       CURRENT   1               2014/12/26 14:31:00
2       2       ORCL     1446008355       ORPHAN  17034938503292    2020/05/09 17:34:36

观察alert日志

Thu May 14 11:21:28 2020
Setting recovery target incarnation to 1

在执行还原脚本，还原成功