>>>>> On Wed, 19 Nov 2008 14:23:57 +0100, Tilman Schmidt said:
>
> On 18.11.2008 19:55, Martin Simmons wrote:
> >>>>>> On Tue, 18 Nov 2008 12:39:33 +0100, Tilman Schmidt said:
> >>
> >> A Linux backup server running Bacula 2.2.8 on openSUSE 10.3 should
> >> back up a single directory D:\SQL-Backup on a Windows client
> >> running the WinBacula 2.4.3 file daemon on Windows Server 2003,
> >> incrementally on weekdays and fully on weekends.
> >> ...
> >> runs fine with level=Full, but with level=Incremental does not back
> >> up anything, instead writing this to the log (including the
> >> extraneous newline):
> >>
> >> --------8<--------8<--------8<--------8<--------8<--------8<--------
> >> 18-Nov 12:10 tms-server-fd JobId 2272: Generate VSS snapshots. Driver="
> >> VSS Win 2003", Drive(s)="D"
> >> 18-Nov 12:10 tms-server-fd JobId 2272: Could not stat D:/SQL-Backup:
> >> ERR=Access is denied.
>
> The server has been rebooted last night for an unrelated reason,
> and now I cannot reproduce the problem anymore. In other words,
> incremental backups work fine now.
>
> >> SysInternals Process Monitor on the client machine tells me that at
> >> the time of the error, bacula-fd.exe does this:
> >>
> >> --------8<--------8<--------8<--------8<--------8<--------8<--------
> >> Date & Time: 11/18/2008 12:10:52 PM
> >> Event Class: File System
> >> Operation: CreateFile
> >> Result: IS DIRECTORY
> >> Path: \Device\HarddiskVolumeShadowCopy3\SQL-Backup
> >> TID: 3464
> >> Duration: 0.0000111
> >> Desired Access: Generic Read
> >> Disposition: Open
> >> Options: Synchronous IO Non-Alert, Non-Directory File
> >> Attributes: n/a
> >> ShareMode: Read
> >> AllocationSize: n/a
> >> -------->8-------->8-------->8-------->8-------->8-------->8--------
> >>
> >> Somehow I fail to understand what the Storage Deamon is trying to do
> >> here, let alone how to convince it to do instead what I want.
> >
> > That use of CreateFile looks wrong to me. Do you have more the SysInternals
> > Process Monitor log from before that call?
>
> When I investigated the problem yesterday I filtered out all calls
> with result=SUCCESS, so all I can say is that all calls before the
> above one were successful.
That's strange, because the Windows "stat" operation should only be calling
CreateFile if calls to GetFileAttributesEx or GetFileAttributes fail (though I
don't know if the monitor will record the events under those names).
> When I try to reproduce it today, logging all file system operations
> regardless of their result, I see the sequence:
>
> QueryOpen \Device\HarddiskVolumeShadowCopy6\SQL-Backup
> CreateFile \Device\HarddiskVolumeShadowCopy6\
> QueryDirectory \Device\HarddiskVolumeShadowCopy6\SQL-Backup
> CloseFile \Device\HarddiskVolumeShadowCopy6\
> CreateFile \Device\HarddiskVolumeShadowCopy6\SQL-Backup
>
> And the CreateFile details are now:
>
> --------8<--------8<--------8<--------8<--------8<--------8<--------
> Date & Time: 11/19/2008 1:57:28 PM
> Event Class: File System
> Operation: CreateFile
> Result: SUCCESS
> Path: \Device\HarddiskVolumeShadowCopy6\SQL-Backup
> TID: 1876
> Duration: 0.0000198
> Desired Access: Read Data/List Directory, Synchronize
> Disposition: Open
> Options: Directory, Synchronous IO Non-Alert, Open For Backup
> Attributes: n/a
> ShareMode: Read, Write, Delete
> AllocationSize: n/a
> OpenResult: Opened
> -------->8-------->8-------->8-------->8-------->8-------->8--------
>
> which looks much saner.
Yes, thought it might be from a different call to CreateFile, after the stat
has succeeded.
> In sum, I guess we'll have to file this in the big "unexplained
> Windows glitch fixed by reboot" bin. :-(
We'll have to wait for it to happen again in the future :-)
__Martin
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