Crosscheck backup of database and skip tablespace

1.Crosscheck backup of database and skip tablespaces.

RMAN> crosscheck backup
2> of database skip tablespace users;

crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=+DATA/cvrman/backupset/2014_06_12/nnndf0_bkp_section_df2_0.541.850049499 RECID=82 STAMP=850049499
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=+DATA/cvrman/backupset/2014_06_12/nnndf0_bkp_section_df2_0.547.850049541 RECID=83 STAMP=850049541
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=+DATA/cvrman/backupset/2014_06_12/nnndf0_bkp_section_df2_0.548.850049619 RECID=84 STAMP=850049619
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/orcl/oracle/3upalfun_1_1 RECID=86 STAMP=850051033
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=+DATA/cvrman/backupset/2014_06_12/nnndf0_tag20140612t133849_0.557.850052343 RECID=90 STAMP=850052341
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=+DATA/cvrman/backupset/2014_06_12/nnndf0_tag20140612t145443_0.559.850056889 RECID=92 STAMP=850056889
Crosschecked 6 objects