RMAN: Data Recovery Advisor – Bloco Corrompido

RMAN: Data Recovery Advisor – Bloco Corrompido

Meus amigos DBAs, podem fazer crediário para seu presente de dia dos pais. Nosso emprego ainda está garantido.
Simulei uma corrupção de bloco em um datafile, e o Data Recovery Advisor do 11g não detectou problema algum (LIST FAILURE), mesmo que o próprio RMAN (VALIDATE DATABASE) tenha reclamado.

Bom, pelo menos na versão 11.1.0.7… testarei novamente quando o 11gR2 sair…

[oracle@labdb ~]$ dd if=/dev/random of=/u01/app/oradata/ORCL/users01.dbf seek=100 obs=8192 count=2
0+2 records in
0+1 records out
256 bytes (256 B) copied, 0.0005 seconds, 512 kB/s
[oracle@labdb ~]$ rman CATALOG=RMAN_USER/RMAN_USER@ORCL TARGET /

Recovery Manager: Release 11.1.0.7.0 - Production on Fri Jul 31 15:43:00 2009

Copyright (c) 1982, 2007, Oracle. All rights reserved.

connected to target database: ORCL (DBID=1217465568)
connected to recovery catalog database

RMAN> VALIDATE DATABASE CHECK LOGICAL;
Starting validate at 31-JUL-09
starting full resync of recovery catalog
full resync complete
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=180 device type=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: SID=171 device type=DISK
RMAN-06169: could not read file header for datafile 4 error reason 4
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of validate command at 07/31/2009 15:45:02
RMAN-06056: could not access datafile 4

RMAN> LIST FAILURE;

starting full resync of recovery catalog
full resync complete
no failures found that match specification
starting full resync of recovery catalog
full resync complete

RMAN> VALIDATE DATABASE;

Starting validate at 31-JUL-09
using channel ORA_DISK_1
using channel ORA_DISK_2
RMAN-06169: could not read file header for datafile 4 error reason 4
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of validate command at 07/31/2009 15:46:19
RMAN-06056: could not access datafile 4

RMAN> LIST FAILURE;

starting full resync of recovery catalog
full resync complete
no failures found that match specification

RMAN> EXIT;

Recovery Manager complete.
[oracle@labdb ~]$