thisis what i get after the plain dd dd if=/dev/rvdsystem01 of=/usr/local/oracle/database/tempdb01/system01.dbf SQL> alter database open; alter database open * ERROR at line 1: ORA-01122: database file 1 failed verification check ORA-01110: data file 1: '/usr/local/oracle/database/tempdb01/system01.dbf' ORA-01251: Unknown File Header Version read for file number 1 "Radoulov, Dimitre" <cichomitiko@xxxxxxxxx> wrote: > I'm trying to test a conversion from raw to filesystems. > a couple of questions am planning to use dd > this is AIX 5.2 > i know to convert from raw to filesystem there is an filesystem header > offset you need to be careful of . > a simple dd wont work to convert. > any ideas suggestions. Did it many times without any problem (on SUN Solaris). Regards, Dimitre