Re: ASM Aliases - Cannot find a Cross Reference - SYS_CONNECT_BY_PATH?

  • From: Kenny Payton <k3nnyp@xxxxxxxxx>
  • To: andrew.kerber@xxxxxxxxx
  • Date: Mon, 10 Aug 2015 19:57:00 -0400

Andrew has probably the best answer but my first thought is that you could
catalog the datafiles, Oracle will know what they are from the headers. Let’s
just say for some reason you did shut the database down, or the power went out
and you had no choice. If the control files have the aliases and the aliases
are no longer there then they would be missing after the bounce. First I’d
copy off one of my control files. You could then try cataloging the files with
RMAN

catalog start with '+S00DATA01’;
catalog start with '+S00DATA02’;
etc…

Then for each of the missing files, issue a “switch datafile X to copy;” in
rman where X is the file_id of the missing datafile. Then verify you are no
longer missing any datafiles. If you’re confident all of the datafiles are now
registered correctly in the controlfile then open the database. If not,
shutdown and restore your control files from the one you copied off and you’re
back where you started.


Kenny



On Aug 10, 2015, at 6:54 PM, Andrew Kerber <andrew.kerber@xxxxxxxxx> wrote:

Sr with oracle. Sev 1. It might not start if you shut it down.

Sent from my iPhone

On Aug 10, 2015, at 4:56 PM, David Barbour <david.barbour1@xxxxxxxxx
<mailto:david.barbour1@xxxxxxxxx>> wrote:

May just sort of be up the proverbial creek on this. I cannot tie together
any data file info from ASM to the alias registered in the database
controlfile.

For instance, I know in the +S00DATA05 diskgroup, the aliases that were
dropped were +S00DATA05/S00/PSAPCOEPD.DATA11 and
+S00DATA05/S00/PSAPCOEPD.DATA12. I know we've got two OMF files in the
diskgroup - +S00DATA05/S00/DATAFILE/PSAPCOEPD.373.883759173 and
+S00DATA05/S00/DATAFILE/PSAPCOEPD.358.883759173.

But how to tell which is which? I suppose I could guess. Got a 50/50
chance here.

Trying to figure out if perhaps sys_connect_by_path could be of use.

This is what the controlfile shows:


1 select file_name from dba_data_files where tablespace_name = 'PSAPCOEPD'
2* order by file_name
SQL> /

FILE_NAME
--------------------------------------------------------------------------------
+S00DATA01/psapcoepd.data01
+S00DATA01/psapcoepd.data02
+S00DATA01/psapcoepd.data03
+S00DATA01/psapcoepd.data21
+S00DATA01/psapcoepd.data26
+S00DATA02/psapcoepd.data04
+S00DATA02/psapcoepd.data10
+S00DATA02/psapcoepd.data22
+S00DATA02/psapcoepd.data27
+S00DATA02/s00/datafile/psapcoepd.791.883760245
+S00DATA03/psapcoepd.data05

FILE_NAME
--------------------------------------------------------------------------------
+S00DATA03/psapcoepd.data06
+S00DATA03/psapcoepd.data23
+S00DATA04/psapcoepd.data07
+S00DATA04/psapcoepd.data08
+S00DATA04/psapcoepd.data09
+S00DATA05/psapcoepd.data11
+S00DATA05/psapcoepd.data12
+S00DATA06/psapcoepd.data13
+S00DATA06/psapcoepd.data14
+S00DATA06/psapcoepd.data15
+S00DATA06/s00/datafile/psapcoepd.304.883760117

FILE_NAME
--------------------------------------------------------------------------------
+S00DATA07/psapcoepd.data16
+S00DATA07/psapcoepd.data17
+S00DATA07/psapcoepd.data18
+S00DATA07/psapcoepd.data24
+S00DATA09/psapcoepd.data19
+S00DATA09/psapcoepd.data20
+S00DATA10/psapcoepd.data25
+S00DATA10/s00/datafile/psapcoepd.307.883758635

30 rows selected.

Here's what I can find in ASM:

+S00DATA01/S00/DATAFILE/PSAPCOEPD.657.883758977
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:36:17 S00DATA01
Y
+S00DATA01/S00/DATAFILE/PSAPCOEPD.658.883759017
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:36:57 S00DATA01
Y
+S00DATA01/S00/DATAFILE/PSAPCOEPD.659.883759047
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:37:27 S00DATA01
Y
+S00DATA01/S00/DATAFILE/PSAPCOEPD.660.883759409
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:43:29 S00DATA01
Y
+S00DATA01/S00/DATAFILE/PSAPCOEPD.661.883759451
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:44:10 S00DATA01
Y
+S00DATA02/S00/DATAFILE/PSAPCOEPD.782.883759077
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:37:56 S00DATA02
Y
+S00DATA02/S00/DATAFILE/PSAPCOEPD.783.883759173
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:39:32 S00DATA02
Y
+S00DATA02/S00/DATAFILE/PSAPCOEPD.784.883759411
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:43:30 S00DATA02
Y
+S00DATA02/S00/DATAFILE/PSAPCOEPD.791.883760245
1.5032E+10 1.5034E+10 DATAFILE 30-JUN-2015 16:57:24 S00DATA02
Y
+S00DATA02/S00/DATAFILE/PSAPCOEPD.794.883760385
1.2885E+10 1.2887E+10 DATAFILE 30-JUN-2015 16:59:44 S00DATA02
Y
+S00DATA03/S00/DATAFILE/PSAPCOEPD.814.883759087
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:38:06 S00DATA03
Y
+S00DATA03/S00/DATAFILE/PSAPCOEPD.815.883759087
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:38:07 S00DATA03
Y
+S00DATA03/S00/DATAFILE/PSAPCOEPD.816.883759421
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:43:41 S00DATA03
Y
+S00DATA04/S00/DATAFILE/PSAPCOEPD.705.883759117
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:38:36 S00DATA04
Y
+S00DATA04/S00/DATAFILE/PSAPCOEPD.706.883759117
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:38:37 S00DATA04
Y
+S00DATA04/S00/DATAFILE/PSAPCOEPD.707.883759123
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:38:42 S00DATA04
Y
+S00DATA05/S00/DATAFILE/PSAPCOEPD.358.883759173
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:39:32 S00DATA05
Y
+S00DATA05/S00/DATAFILE/PSAPCOEPD.373.883759173
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:39:32 S00DATA05
Y
+S00DATA06/S00/DATAFILE/PSAPCOEPD.304.883760117
1.6106E+10 1.6108E+10 DATAFILE 30-JUN-2015 16:55:16 S00DATA06
Y
+S00DATA06/S00/DATAFILE/PSAPCOEPD.491.883759191
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:39:50 S00DATA06
Y
+S00DATA06/S00/DATAFILE/PSAPCOEPD.492.883759229
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:40:28 S00DATA06
Y
+S00DATA06/S00/DATAFILE/PSAPCOEPD.514.883759237
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:40:37 S00DATA06
Y
+S00DATA07/S00/DATAFILE/PSAPCOEPD.339.883759265
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:41:04 S00DATA07
Y
+S00DATA07/S00/DATAFILE/PSAPCOEPD.340.883759293
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:41:32 S00DATA07
Y
+S00DATA07/S00/DATAFILE/PSAPCOEPD.341.883759361
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:42:40 S00DATA07
Y
+S00DATA07/S00/DATAFILE/PSAPCOEPD.342.883759439
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:43:59 S00DATA07
Y
+S00DATA09/S00/DATAFILE/PSAPCOEPD.335.883759361
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:42:40 S00DATA09
Y
+S00DATA09/S00/DATAFILE/PSAPCOEPD.336.883759409
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:43:29 S00DATA09
Y
+S00DATA10/S00/DATAFILE/PSAPCOEPD.307.883758635
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:30:34 S00DATA10
Y
+S00DATA10/S00/DATAFILE/PSAPCOEPD.312.883759451
2.1475E+10 2.1477E+10 DATAFILE 30-JUN-2015 16:44:10 S00DATA10
Y

On Mon, Aug 10, 2015 at 12:58 PM, David Barbour <david.barbour1@xxxxxxxxx
<mailto:david.barbour1@xxxxxxxxx>> wrote:
Oracle 11.2.0.3, RHEL 6.6

Several Oracle ASM aliases were removed using the ALTER DISKGROUP DROP ALIAS
command.

Now the backups on the database are failing because the controlfile is still
using the alias name.

Any suggestions?

The database is running fine because the underlying OMF files are there. So
somewhere there's a link. I need to match the OMF ASM file with the
database alias(es). If I could find the link, then I could take the
tablespace offline and run the set newname in Rman - I think.



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