repartition active machine

[Bob Hartung]

Hi all,
   Here is the issue & I am a relative newbie:
    I have a older Linux server with two partitions: /mammdata and 
/rgdata.  The latter partition is no longer needed as the storage 
requirements exploded and it was all moved to a NAS.  /mammdata is 
almost full.  Will this scenario work:

1.  Back up all data on /mammdata (this is a SMB share)
2.  fdisk and delete the partitions /mammdata and /rgdata1
3.  create a new partition to use all the space no longer used by the 
two deleted partitions
4.  mkfs.ext3 -jvL pt-data
5.  restore the backed up data from originally on /mammdata

Thanks for you input,

Bob