1. With instance mounted, isue
ALTER DATABASE DATAFILE 'filexxx' END BACKUP;
for all the files of the tablespace that was in backup mode.
2. Restore the previous backup of datafiles and recover the database as usually.
In both cases youl'll get the database in the state it was immediately before the crash.
ASCII a stupid question, get a stupid ANSI
24 hours in a day .... 24 beer in a case .... coincidence?