Hello Pasi,

I had a similar strange behaviour with backup via VSS on Windows 2003 Server on 
different systems and I assume your problem refers to the M$-VSS service too. 
In order to determine if the issue refers to M$-Windows or to Bacula try to 
make backup via the Windows backup tool "ntbackup" at the DOS-prompt:

ntbackup backup "a path you want to backup" /j "test" /l:f /f "a path where to 
store backup file"

This performs a backup via VSS. Take a look in to the eventlog application and 
system in order to see if VSS and ntbackup worked.

If a test backup with ntbackup via VSS fails, perform a test backup without 
reading backup data via VSS:

ntbackup backup "<a path you want to backup>" /j "test" /l:f /snap:off /f "<a 
path where to store backup file>"

If the test backup via VSS does not work you will most likely have a problem 
referred to VSS.

With 

"vssadmin list writers"

on DOS-prompt you can see if the VSS-writers have any problems. But in my case 
"vssadmin" did not show any VSS-writer problems although we had a real 
VSS-problem.

There is a Microsoft web page which may be will give you a solution: 
http://dnn.mssbsfaq.de/SBS2003/Backup/ReinitialisierungdesVolumeShadowCopyService/tabid/1038/language/de-DE/Default.aspx
 . But, alas, it is in german.

Microsoft says, if you have a faulty installation - what ever this means - has 
changed involved components of VSS it could affect the VSS-functionality. If 
so, you have to reregister the VSS-components by doing the following on DOS 
prompt or via a batch file:

cd %windir%\system32
Net stop vss
Net stop swprv
regsvr32 ole32.dll
regsvr32 vss_ps.dll
Vssvc /Register
regsvr32 /i swprv.dll
regsvr32 /i eventcls.dll
regsvr32 es.dll
regsvr32 stdprov.dll
regsvr32 vssui.dll
regsvr32 msxml.dll
regsvr32 msxml3.dll
regsvr32 msxml4.dll
Net start swprv
Net start vss

We did this here with our system and our third-party backup system and ntbackup 
worked fine again.

I heard from the support of out third-party backup product that more and more 
customers run into VSS problems if they make backups via VSS and all clues 
seems to lead to M$-Windows' VSS. 

Jürgen

-----Ursprüngliche Nachricht-----
Von: bacula-users-bounces AT lists.sourceforge DOT net 
[mailto:bacula-users-bounces AT lists.sourceforge DOT net] Im Auftrag von Pasi 
Kärkkäinen
Gesendet: Montag, 2. Juni 2008 18:26
An: John Drescher
Cc: baculausers
Betreff: Re: [Bacula-users] Bacula VSS problems / ERR=Access is denied

On Mon, Jun 02, 2008 at 07:09:58PM +0300, Pasi Kärkkäinen wrote:
> On Mon, Jun 02, 2008 at 09:40:23AM -0400, John Drescher wrote:
> > > btw. is there a way to make bacula automatically rerun jobs failing like 
> > > this?
> > >
> > Although I have never done this the following two bacula directives
> > look like they could help:
> > 
> > Run After Failed Job
> > 
> > Rerun Failed Levels
> > 
> > http://www.bacula.org/en/dev-manual/Configuring_Director.html
> > 
> 
> Hmm.. it almost looks like 50% of the times I get that VSS error.. ie. every
> second time it works and every second time it doesn't.
> 
> What's interesting is that the job itself terminates with "OK with
> warnings".. it's definitely not OK because it does absolutely nothing.. 
> 0 files backup up when that Access is denied happens.. 
> 

Yeah, did some 8 more test runs and 4 of them failed with that VSS
ERR=Access is denied error.. 

Is it possible that winbacula leaves VSS in some bad state? That would
maybe explain why it works every second time.. or is it more likely that 
there is something on the server causing this? 

-- Pasi

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