1 Reply Latest reply: Feb 18, 2013 7:57 PM by Hemant K Chitale RSS

    Is it necessary to take RMAN backup for ASM

    Vicky C
      Hi all
      I also know we need RMAN to take backup for ASM . But i also seen its possible to take backup by using dd command itself on ASM . Why we need RMAN rather than this method . What is the specific reason we using RMAN,
        • 1. Re: Is it necessary to take RMAN backup for ASM
          Hemant K Chitale
          its possible to take backup by using dd command itself on ASM
          Very bad idea.

          1. You'll run into the classic "fractured block" issue when attempting a recover or reading a block after the restore
          2. RMAN can be used to
          a relocate individual datafiles,
          b duplicate / clone database,
          c restore to an alternate server,
          d copy / move from ASM to filesystem
          e verify for corruption
          f generate reports on backups taken
          None of which dd of ASM will do reliably (depending on the skills of the DBA/SA).


          Hemant K Chitale

          Edited by: Hemant K Chitale on Feb 19, 2013 9:56 AM
          Added the words : "reliably (depending on the skills of the DBA/SA)"