dbverify utility syntax

The primary tool for checking for corruption in an Oracle database is DBVERIFY. It can be used to perform a physical data structure integrity check on data files whether the database is online or offline. The big benefit of this is that DBVERIFY can be used to check backup data files without adding load to the database server. You invoke DBVERIFY from the operating system command line like this:
$ dbv file=dbfPATH/data01.dbf logfile=logfilepath/verify.log blocksize=8192 feedback=100
In this example data01.dbf is the data file to check, and the tablespace this file belongs to has a block size of 8192 bytes. The feedback parameter tells DBVERIFY to draw a period on the screen after every 100 pages (blocks) of the file are verified.
In the log file you’ll see output like this:

DBVERIFY: Release 10.2.0.1.0 - Production on Mon Nov 2 16:06:38 2009

Copyright (c) 1982, 2005, Oracle. All rights reserved.


DBVERIFY - Verification starting : FILE = d:\oracle\product\10.2.0\oradata\emsts\smttab01.dbf


DBVERIFY - Verification complete

Total Pages Examined : 262144
Total Pages Processed (Data) : 58669
Total Pages Failing (Data) : 0
Total Pages Processed (Index): 50674
Total Pages Failing (Index): 0
Total Pages Processed (Other): 2588
Total Pages Processed (Seg) : 0
Total Pages Failing (Seg) : 0
Total Pages Empty : 150213
Total Pages Marked Corrupt : 0
Total Pages Influx : 0
Highest block SCN : 3240352395 (0.3240352395)