RE: Recover from lost log volume

Hi David,

in order to recreate the logvolumes it is not sufficient to
restore data/restore log. Instead of a restore data you has to
"reactivate" the instance with the dbmcli-command
	db_activate RECOVER <your databackupmedium>

The dbmgui offeres this option by using "recovery with initialization"

But be aware that all data in the data- and logvolumes is cleared by
this
step.

Kind regards, Martin

> -----Original Message-----
> From: David Lane [mailto:[email protected]] 
> Sent: Tuesday, January 30, 2007 11:03 AM
> To: Hahn, Uwe; [email protected]
> Subject: RE: Recover from lost log volume
> 
> Uwe,
> 
> Thanks for your reply. I have tried that. 
> - Restore full - works ok
> - Restore pages - works ok
> - Restore log - fails.
> 
> Dbmcli reports
> -24920,ERR_BACKUPOP: backup operation was unsuccessful
> The database was unable to fulfill a request (-902, I/O error).
> 
> Database messages (verbose) shows:
>   2007-01-30 09:51:47     IO         11597:  Open
> '/var/opt/sdb/data/MAXDB1/log/DISKL0001' successfull, fd: 17
> Thread   0x1A
>   2007-01-30 09:51:47 ERR IO/READ    11987:  read error: rc=0,
> wanted=8192, 'NO ERROR(0)', try again
> Then
> Thread   0x14 Task  97
>   2007-01-30 09:51:49     vattach    11000:
> '/var/opt/sdb/data/MAXDB1/log/DISKL0001' T97 failed
> Thread   0x14 Task  97
>   2007-01-30 09:51:49 ERR IOMan         26:  Attach error on 
> Log volume
> 1: Could not open volume
> Thread   0x14 Task  97
> 
> The problem is that the log volume
> /var/opt/sdb/data/MAXDB1/log/DISKL0001 was lost.
> I have tried the log restore with 
> /var/opt/sdb/data/MAXDB1/log/DISKL0001
> missing, and it fails.
> I also tried creating an empty /var/opt/sdb/data/MAXDB1/log/DISKL0001
> file, but it still fails.
> 
> I cannot find any way to recreate
> /var/opt/sdb/data/MAXDB1/log/DISKL0001.
> 
> Your help will be much appreciated.
> 
> Thanks
> 
> David Lane
> 
> > -----Original Message-----
> > From: Hahn, Uwe [mailto:[email protected]] 
> > Sent: 29 January 2007 17:54
> > To: David Lane; [email protected]
> > Subject: RE: Recover from lost log volume
> > 
> > Hi David,
> > 
> > you have to reinstall your database instance with your last 
> > data- and log-backups.
> > 
> > Kind regards
> > Uwe
> > 
> > -----Original Message-----
> > From: David Lane [mailto:[email protected]]
> > Sent: Montag, 29. Januar 2007 15:43
> > To: [email protected]
> > Subject: RE: Recover from lost log volume
> > 
> >  I forgot to mention: I am running MaxDB 7.6 on solaris 9.
> > 
> > > -----Original Message-----
> > > From: David Lane [mailto:[email protected]]
> > > Sent: 29 January 2007 14:37
> > > To: [email protected]
> > > Subject: Recover from lost log volume
> > > 
> > > How do I recover from total loss of my log volume? I can restore 
> > > database backups ok, but when, after restoring the backups, 
> > I try to 
> > > change the database to online mode (from
> > > dbmgui) I get
> > >  
> > > -24988 sql error [db_online -f] -902,I/O error.
> > >  
> > > In knldiag:
> > >  
> > > 2007-01-29 14:23:20       0x14     11000 vattach
> > > '/var/opt/sdb/data/MAXDB1/log/DISKL0001' T92 failed
> > > 2007-01-29 14:23:20       0x14 ERR    26 IOMan    Attach 
> > error on Log
> > > volume 1: Could not open volume
> > > 
> > > /var/opt/sdb/data/MAXDB1/log/DISKL0001 is the lost log 
> > volume. I have 
> > > tried creating the file (just an empty file) and that makes no 
> > > difference. I found something in the mailing archive about 
> > > 'util_execute clear log' to reinit the log, but that crashes the 
> > > database.
> > >  
> > > What am I missing?
> > >  
> > > Thanks
> > >  
> > > David Lane
> > >  
> > >  
> > > 
> > > 
> > 
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