在没有备份的情况下，如何修复数据文件中的坏块？

ALLSTARS_ORACLE

请教：在没有备份的情况下，如何修复数据文件中的坏块？


我使用第一种方法进行修复时，它还是用到了备份片
RMAN> run { blockrecover datafile 5 block 135; }

Starting recover at 11-APR-17
using channel ORA_DISK_1

channel ORA_DISK_1: restoring block(s)
channel ORA_DISK_1: specifying block(s) to restore from backup set
restoring blocks of datafile 00005
channel ORA_DISK_1: reading from backup piece /u01/app/oracle/fast_recovery_area/orcl/ORCL/backupset/2017_04_11/o1_mf_nnndf_TAG20170411T150735_dgs05r0m_.bkp
channel ORA_DISK_1: piece handle=/u01/app/oracle/fast_recovery_area/orcl/ORCL/backupset/2017_04_11/o1_mf_nnndf_TAG20170411T150735_dgs05r0m_.bkp tag=TAG20170411T150735
channel ORA_DISK_1: restored block(s) from backup piece 1
channel ORA_DISK_1: block restore complete, elapsed time: 00:00:01

starting media recovery
media recovery complete, elapsed time: 00:00:03

Finished recover at 11-APR-17

RMAN>