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its possible to take backup by using dd command itself on ASMVery 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)"