 | | | Restore and Recover Fuzzy datafiles | Restore and Recover Fuzzy datafiles 2006-05-25 - By Ian Cary (C)
There is a parameter
_allow_resetlogs_corruption=TRUE
That may allow you to open a database that has fuzzy datafiles. I've
seen it work when a database has been cloned but someone (not me) had
forgotten to issue a begin backup command. I used it to force the
database to open as I was sure-ish no work had been done while the
datafiles had been copied. Every thing seemed Okay especially as it was
only a test database anyhow.
I believe that if any work has been done and you try and use
inconsistent data you will get an ORA-600 (See ORA-600.ora-code.com) type error however you may be
able restore something by selecting around the problem i.e. identify the
rows that are inconsistent and cause an ORA-600 (See ORA-600.ora-code.com) and don't select them.
Cheers,
Ian
.
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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>There is a parameter <o:p></o:p></span><
/font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>_allow_resetlogs_corruption=TRUE<o:p></o:p
></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>That may allow you to open a database that
has fuzzy datafiles. I’ve seen it work when a database has been cloned
but someone (not me) had forgotten to issue a begin backup command. I used it
to force the database to open as I was sure-ish no work had been done while the
datafiles had been copied. Every thing seemed Okay especially as it was only a
test database anyhow.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I believe that if any work has been done
and
you try and use inconsistent data you will get an ORA-600 (See ORA-600.ora-code.com) type error however you
may be able restore something by selecting around the problem i.e. identify the
rows that are inconsistent and cause an ORA-600 (See ORA-600.ora-code.com) and don’t select them. <o
:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Cheers,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Ian<o:p></o:p></span></font></p>
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<pre>.
This email is only intended for the person to whom it is addressed and may
contain confidential information. If you have received this email in error,
please notify the sender and delete this email which must not be copied,
distributed or disclosed to any other person.
Unless stated otherwise, the contents of this email are personal to the writer
and do not represent the official view of Ordnance Survey. Nor can any contract
be formed on Ordnance Survey's behalf via email. We reserve the right to
monitor emails and attachments without prior notice.
Thank you for your cooperation.
Ordnance Survey
Romsey Road
Southampton SO16 4GU
Tel: 023 8079 2000
http://www.ordnancesurvey.co.uk
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