Backup exec error oracle 11GR2 with grid

The error bakcup is: Then oracle database and grid are two roles users

uid=500(oracle) gid=500(oinstall) groups=500(oinstall),501(dba),502(oper),503(asmadmin),504(beoper)

uid=501(grid) gid=500(oinstall) groups=500(oinstall),501(dba),502(oper),503(asmadmin),504(beoper)

Recovery Manager: Release 11.2.0.2.0 - Production on Thu Oct 11 10:57:33 2012

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

 
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
ORA-00204: error in reading (block 1, # blocks 1) of control file
ORA-00202: control file: '+DATA1/silwb/controlfile/current.288.796294089'
ORA-15081: failed to submit an I/O operation to a disk

 
 
 # -----------------------------------------------------------------
 # RMAN command section
 # -----------------------------------------------------------------
 
 RUN {
 ALLOCATE CHANNEL ch0
     TYPE 'SBT_TAPE';
 SEND 'BSA_SERVICE_HOST=172.16.1.162,NBBSA_TOTAL_STREAMS=1,NBBSA_JOB_COOKIE={0F6C9F56-BEEF-4F92-B482-2A9150D793EB},NBBSA_DB_DEVICE_NAME=Oracle-Linux::\\enoc.usil.edu.pe\SILWB';
 BACKUP
     INCREMENTAL LEVEL=0
     FORMAT 'BE_U'
     DATABASE FORCE PLUS ARCHIVELOG FORCE NOT BACKED UP;
 
 RELEASE CHANNEL ch0;
 }
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of allocate command at 10/11/2012 10:57:34
ORA-00204: error in reading (block 1, # blocks 1) of control file
ORA-00202: control file: '+DATA1/silwb/controlfile/current.288.796294089'
ORA-15081: failed to submit an I/O operation to a disk

 EXIT

Recovery Manager complete.