RMAN takes too long to complete restoring a db

Hi there,

I'm trying to make a complete restore of a database using RMAN, I have a full backup on tape. The media manager is EMC Networker.

My server runs Oracle Linux 6.5, the Oracle software is Oracle Database Enterprise Edition 11g (11.2.0.4).

After preparing the pfile, the next step was to restore the control file, but then it just stays there:

export ORACLE_SID=

rman target /

shutdown abort

SET DBID=<original dbid>;

RMAN> STARTUP FORCE NOMOUNT PFILE='/u01/app/oracle/product/11.2.0/dbhome_1/dbs/pfile.ora';

RMAN> RUN {

  ALLOCATE CHANNEL CH1 TYPE 'SBT_TAPE';

    SEND DEVICE TYPE 'SBT_TAPE' 'NSR_ENV=(NSR_CHECKSUM=true)';