Re: Disaster Recovery Exercise - correction
- From: Charlotte Hammond <charlottejanehammond@xxxxxxxxx>
- To: "oracle-l@xxxxxxxxxxxxx" <oracle-l@xxxxxxxxxxxxx>
- Date: Fri, 28 Oct 2005 02:53:15 -0700 (PDT)
Hi Tony,
I'm not sure if this is all you need, but have you
tried:
ALTER DATABASE RENAME FILE 'X:\old\redo.log' TO
'Y:\new\redo.log';
For all your redo logs before doing an open reset
logs.
Charlotte
>> <t_adolph@xxxxxxxxxxx>
>> Sent by: oracle-l-bounce@xxxxxxxxxxxxx
>> 28/10/2005 11:07
>> Please respond to t_adolph
>>
>> To: "ORACLE-L"
<oracle-l@xxxxxxxxxxxxx>
>> cc:
>> Subject: Disaster Recovery Exercise -
correction
>>
>>
>>Hi all,
>>
>>I'm just playing with a test database and trying
different DR scenarios. My d
atabase is in archive log mode.
>>
>>I'm simulating a total loss of online redo logs. I
have only 2 logfiles and I
've put both of them on a thumb drive.
>>
>>Please ignore the last post, I missed something out,
sorry. I'll try again...
>>
>>I've made a full online / hot backup (ts begin
backup; copy dbf; ts end backup
). I have all archived redos online.
>>
>>So far:
>>
>>a) pulled the thumb drive out (sorry Windows
people, but itrs a good way to
simulate a disk failure) - so loose online redos
>>b) shutdown abort
>>c) startup and try to open, get the error that
the redo are unavailable.
>>
>>Normally here, I'd have to make sure the disk that
failed was operational read
y for my "reset redos". Then recover the datafiles
from backup and do a "recover
database until cancel", CANCEL, "open database
resetlogs"
>>
>>But, I want to assume that the drive that failed is
totally buggered (dead, k
aput etc for the non-English out there :-) ), so I
proceed as follows:
>>
>>d) add two new redo logs on another drive.
>>d.1) droped the inactive redo log, leavig the
active, but missing redo log.
>>e) restore the dbf files from backup
>>f) recover database until cancel... RETURN,
RETURN, CANCEL (at missing arch
ive redo)
>>
>>This is where my knowledge lets me down... I wanted
to open reset logs, but ob
viously Oracle wants to re-create the active redo log
(that was on the dead driv
e). I tried to drop it, but (again obviously) Oracle
complains that its require
d for recovery.
>>I tried (just as a hack, rather than expecting it to
work) to clear the redo l
og, but that fails as Oracle tries to recreate the
missing log... but again, the
drive no longer exists.
>>
>>How do I tell Oracle that I'm trying to do a Point
In Time recovery and to for
ce the drop of the active redo log?
>>
>>Cheers
>>Tony
>>PS : Oracle 9.2.0.7 on WinNT
>>PPS : please no posts about how stupid my setup is.
I know that, its just an
exercise in DR. Thanks.
>>
>>
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