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
I've always used the bs option(bs=1048576 in my case):
bs=n Set both input and output block sizes to n bytes, superseding ibs= and obs=. If no conversion other than sync, noerror, and notrunc is specified, each input block will be copied to the output as a single block without aggregating short blocks.
Example:
dd if=/dev/vx/rdsk/... of=/u01/oracle/... bs=1048576
And I found this on MetaLink:
Reference: =========== Note:1027958.6 MPP: (UNIX) COPYING RAW DEVICE TO FILE SYSTEM USING DD COMMAND
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