Re: Corruption with active duplication

  • From: Mladen Gogala <gogala.mladen@xxxxxxxxx>
  • To: "Ruel, Chris" <Chris.Ruel@xxxxxxx>, oracle-l <oracle-l@xxxxxxxxxxxxx>
  • Date: Thu, 8 Nov 2018 22:08:51 -0500

No, unfortunately, the database is active. The dbverify isn't very good on active data files.


On 11/8/18 10:03 PM, Ruel, Chris wrote:

Try running a dbverify command on the corrupt datafile?


Chris Ruel * Distributed Database Services * Lincoln Financial Group

cruel@xxxxxxx <mailto:cruel@xxxxxxx>* Desk:317.759.2172 * Cell 317.523.8482

*From:*oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] *On Behalf Of *Mladen Gogala
*Sent:* Thursday, November 08, 2018 9:17 PM
*To:* oracle-l <oracle-l@xxxxxxxxxxxxx>
*Subject:* Corruption with active duplication

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I am doing an active duplication of one test database to another one, for another group of developers. Here is what I am getting:

consistency value in tail: 0x00000001
 check value in block header: 0xb601
 computed block checksum: 0x0
Reading datafile '/U02/oradata/test2a/data21.dbf' for corruption at rdba: 0x11000001 (file 68, block 1)
Reread (file 68, block 1) found same corrupt data (no logical check)
Hex dump of (file 69, block 1) in trace file /app01/oracle/diag/rdbms/test2a/test2/trace/test2_ora_25016.trc
Corrupt block relative dba: 0x11400001 (file 69, block 1)

It probably means that the source database is corrupt, yet there is nothing in the alert log.  I will do backup validate logical, but this will take some time, since it's a database over 2TB.  Does anyone have any idea how to establish whether the source DB is corrupt faster than using backup validate?

Mladen Gogala
Database Consultant
Tel: (347) 321-1217

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Mladen Gogala
Database Consultant
Tel: (347) 321-1217

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