ORA-00333: redo log read error block 17258 count 7490

After a power failure, at startup we received folowing error
ORA-00333: redo log read error block 17258 count 7490

When i tried to do
alter database clear logfile '/u02/app/oracle/oradata/redo01.log',

i received
ORA-1624 signalled during: alter database clear logfile '/u02/app/oracle/oradata/redo01.log'...

The only solutions was restore of database, from a full backup with rman.
The control file was ok

RMAN> connect target /
RMAN> startup mount;
RMAN> restore database;
RMAN> alter database open resetlogs;


RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of alter db command at 02/27/2012 16:18:45
ORA-01139: RESETLOGS option only valid after an incomplete database recovery

from this connect to SQL Plus

SQL> recover database until cancel;

ORA-00279

SQL> cancel

SQL> alter database open resetlogs;

if the control file was not ok.

RMAN> connect target /
RMAN> startup nomount;
RMAN> restore controlfile from autobackup;
RMAN> alter database mount;
RMAN> restore database;
RMAN> alter database open resetlogs;