ORA-01578(資料塊損壞)跳過壞塊處理辦法

-- 1. 檢查損壞的物件
SELECT tablespace_name, segment_type, owner, segment_name
            FROM dba_extents
           WHERE file_id = 4
             and 65 between block_id AND block_id + blocks - 1;

-- 2. 設定內部事件，使exp跳過損壞的block
ALTER SYSTEM SET EVENTS=’10231 trace name context forever,level 10’ ;  

-- 3. 匯出表
exp user1/passwd1 file=t1.dmp tables=t1

-- 4. 刪除有壞塊的表
drop table t1 purge;

-- 5. 匯入表
imp user1/passwd1 file=t1.dmp tables=t1

-- 6. 清除跟蹤事件
ALTER SYSTEM SET EVENTS=’10231 trace name context off’;