oracle block phisical address to block#

SQL> select DBMS_UTILITY.DATA_BLOCK_ADDRESS_FILE( TO_NUMBER(‘0300c7f8‘, ‘XXXXXXXX’) ) FILE#,
DBMS_UTILITY.DATA_BLOCK_ADDRESS_BLOCK( TO_NUMBER(‘0300c7f8‘, ‘XXXXXXXX’) ) BLOCK#
from dual;
2 3
FILE# BLOCK#
———- ———-
12 51192

[@more@]

function rowid_create(rowid_type IN number,
object_number IN number,
relative_fno IN number,
block_number IN number,
row_number IN number)
return rowid;

ORA-08103壞快

dd if=資料檔名 of=輸出檔名 bs=塊大小 skip=塊號