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RE: Urgent: Prodution database recovery

From: Jack van Zanen <nlzanen1_at_EY.NL>
Date: Fri, 31 May 2002 05:08:25 -0800
Message-ID: <F001.00470AF7.20020531050825@fatcity.com> 




                                                                                                                                       
                      "Hand, Michael T"                                                                                                
                      <HANDM_at_polaroid.c        To:       Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>                   
                      om>                      cc:       (bcc: Jack van Zanen/nlzanen1/External/MEY/NL)                                
                      Sent by:                 Subject:  RE: Urgent: Prodution database recovery                                       
                      root_at_fatcity.com                                                                                                 
                                                                                                                                       
                                                                                                                                       
                      30-05-2002 20:32                                                                                                 
                      Please respond to                                                                                                
                      ORACLE-L                                                                                                         
                                                                                                                                       
                                                                                                                                       











 Thanks David,


You hit the nail on the head.  Hardware problems are preventing the backup
files from restoring normally.  We've got several hardware experts on site
this morning going over the disk/filesystem with a fine-tooth comb.  File
header dump shows file_id mismatch which disappeared in 2 instances when
the


files were re-restored.



Mike



-----Original Message-----


To: Multiple recipients of list ORACLE-L
Sent: 5/30/02 6:03 AM



Don't know whether this is of any use, but could it be that you still
have a


hardware fault that is causing your restore to become corrupted?



Regards


David Lord



> -----Original Message-----

> From: Hand, Michael T [mailto:HANDM_at_polaroid.com]

> Sent: 30 May 2002 10:23

> To: Multiple recipients of list ORACLE-L

> Subject: Urgent: Prodution database recovery

>

>

> Env: 8.1.7.3

>      Compaq Alpha Tru64 5.1a

>

> An apparent hardware problem caused corrupt blocks ora-600

> [12700] to be

> detected.  Analyze table validate structure confirmed this error.  We

> started a PITR to a time before the errors were detected.

> All datafiles

> were restored (file copy took ~7.5hrs [614Gb]), current

> control files & redo

> logs (10 groups / 2 members).

>

> But when the alter database recover database until time 'xxx'

> is issued, a

> corrupt header is detected in one of the datafiles

> (ora1122/1251).  Now this

> is a disk mirror split backup.  We've used this process to create a

> reporting database copy for years and the reporting copy was

> build cleanly

> from the same source several hours after the backup copy.

> DBverify against

> the split backup copy and against the restored file (with the corrupt

> header) detect no errors but return diffent results for

> used/free/other

> blocks.

>

> Now, this first attempt at recovery opened about 1/3 of the

> datafiles.  My

> thought was to restore these ~100 datafile again and retry

> the recovery.

>

> Right now I'm a little bleary-eyed so any suggestions would

> be welcome.

>

> Thanks,

> Mike Hand

> Polaroid Corp.

> --

> Please see the official ORACLE-L FAQ: http://www.orafaq.com

> --

> Author: Hand, Michael T

>   INET: HANDM_at_polaroid.com

>

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--
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--
Author: Lord, David - CSG
  INET: David.Lord_at_hayscsg.com

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Author: Hand, Michael T
  INET: HANDM_at_polaroid.com

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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Jack van Zanen
  INET: nlzanen1_at_EY.NL

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Received on Fri May 31 2002 - 08:08:25 CDT












Original text of this message













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