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shadow copies - children

Source: microsoft.public.virtualserver
Sent: 02/05/2009
From: "Les Connor [SBS MVP]" <(email address - cut out)>
Message:

I've got two hyper-v children, and I'd like this to happen:

1. shadow copies enabled in both children
2. parent backs up with WSB, capturing the children as well.

I've got a couple of issues.

First, it seems the enabling of shadow copies in the child OS's doesn't
survive a restart. That's leading me to believe perhaps it's not supposed to
be done, but I haven't found any guidance on this.

Second, when attempting to back up the parent, with shadow copies enabled in
the children, I received some errors on the host and the backup failed. I
also received an error in one of the children, but not the other.

I was careful not to have conflicts in the timing of the various shadow
copies. The parent does have the hyper-v VSS writer regedits, and shadow
copies are enabled on all parent volumes. I used kb958622, but it's not
clear to me from that kb whether the requirement to enable shadow copies is
referring to the parent, children, or both.

I've since disabled shadow copies within the child OS's, and a subsequent
backup is running and it appears it will succeed.

Are shadow copies in children acceptable practice?
Should a WSB of the parent succeed, with shadow copies enabled in the
children?

Sorry for not posting the event log errors; I'll do so later if need be.

--
-----------------------------------------------
Les Connor [SBS MVP]

Post Reply | This is Spam! | Mark as Spam

Related Messages

Re: shadow copies - children

Sent: 02/07/2009
From: "Les Connor [SBS MVP]" <(email address - cut out)>
Message:

The symptoms match, hopefully this will be the solution:

http://support.microsoft.com/default.aspx?scid=kb;EN-US;959962

--
-----------------------------------------------
Les Connor [SBS MVP]

"Les Connor [SBS MVP]" <(email address - cut out)> wrote in message
news:OOkFuZ$(email address - cut out)...

Show quoted text

> I've got two hyper-v children, and I'd like this to happen:
>
> 1. shadow copies enabled in both children
> 2. parent backs up with WSB, capturing the children as well.
>
> I've got a couple of issues.
>
> First, it seems the enabling of shadow copies in the child OS's doesn't
> survive a restart. That's leading me to believe perhaps it's not supposed
> to be done, but I haven't found any guidance on this.
>
> Second, when attempting to back up the parent, with shadow copies enabled
> in the children, I received some errors on the host and the backup failed.
> I also received an error in one of the children, but not the other.
>
> I was careful not to have conflicts in the timing of the various shadow
> copies. The parent does have the hyper-v VSS writer regedits, and shadow
> copies are enabled on all parent volumes. I used kb958622, but it's not
> clear to me from that kb whether the requirement to enable shadow copies
> is referring to the parent, children, or both.
>
> I've since disabled shadow copies within the child OS's, and a subsequent
> backup is running and it appears it will succeed.
>
> Are shadow copies in children acceptable practice?
> Should a WSB of the parent succeed, with shadow copies enabled in the
> children?
>
> Sorry for not posting the event log errors; I'll do so later if need be.
>
> --
> -----------------------------------------------
> Les Connor [SBS MVP]

Re: shadow copies - children

Sent: 02/08/2009
From: "Les Connor [SBS MVP]" <(email address - cut out)>
Message:

That changed things, got a bit further but still no success. So long as the
guests are shut down, the host backs up fine.

With the guests running, the shadow copies within the guests that are kicked
off from a host backup seem to get done, but the host is having trouble. It
could be a resource issue with the host, or, who knows?

--
-----------------------------------------------
Les Connor [SBS MVP]

"Les Connor [SBS MVP]" <(email address - cut out)> wrote in message
news:uFv$(email address - cut out)...
Log Name: System
Source: PlugPlayManager
Date: 2/7/2009 11:07:54 PM
Event ID: 12
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: JDP-Host
Description:
The device 'Storage miniport driver'
(VMBUS\{0574b34b-0b01-4dca-8d54-e20bfe3691a0}\1&3189fc23&0&{0574b34b-0b01-4d
ca-8d54-e20bfe3691a0}) disappeared from the system without first being
prepared for removal.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="PlugPlayManager" />
<EventID Qualifiers="49152">12</EventID>
<Level>2</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2009-02-08T05:07:54.000Z" />
<EventRecordID>17597</EventRecordID>
<Channel>System</Channel>
<Computer>JDP-Host</Computer>
<Security />
</System>
<EventData>
<Data>Storage miniport driver</Data>
<Data>VMBUS\{0574b34b-0b01-4dca-8d54-e20bfe3691a0}\1&3189fc23&0&
amp;{0574b34b-0b01-4dca-8d54-e20bfe3691a0}</Data>
<Binary>00000000</Binary>
</EventData>
</Event>

Log Name: System
Source: PlugPlayManager
Date: 2/7/2009 11:07:54 PM
Event ID: 12
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: JDP-Host
Description:
The device 'Msft Virtual Disk SCSI Disk Device'
(SCSI\Disk&Ven_Msft&Prod_Virtual_Disk\2&1590bd59&0&000000) disappeared from
the system without first being prepared for removal.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="PlugPlayManager" />
<EventID Qualifiers="49152">12</EventID>
<Level>2</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2009-02-08T05:07:54.000Z" />
<EventRecordID>17598</EventRecordID>
<Channel>System</Channel>
<Computer>JDP-Host</Computer>
<Security />
</System>
<EventData>
<Data>Msft Virtual Disk SCSI Disk Device</Data>
<Data>SCSI\Disk&Ven_Msft&Prod_Virtual_Disk\2&1590bd59&0&
amp;000000</Data>
<Binary>00000000</Binary>
</EventData>
</Event>

Log Name: System
Source: Ntfs
Date: 2/7/2009 11:10:19 PM
Event ID: 137
Task Category: (2)
Level: Error
Keywords: Classic
User: N/A
Computer: JDP-Host
Description:
The default transaction resource manager on volume
\\?\Volume{89a4ea70-f014-11dd-b0e5-001517a5c858} encountered a non-retryable
error and could not start. The data contains the error code.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Ntfs" />
<EventID Qualifiers="49156">137</EventID>
<Level>2</Level>
<Task>2</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2009-02-08T05:10:19.682Z" />
<EventRecordID>17608</EventRecordID>
<Channel>System</Channel>
<Computer>JDP-Host</Computer>
<Security />
</System>
<EventData>
<Data>
</Data>
<Data>\\?\Volume{89a4ea70-f014-11dd-b0e5-001517a5c858}</Data>
<Binary>1C0004000200300002000000890004C000000000E90000C00000000000000000
0000000000000000E90000C0</Binary>
</EventData>
</Event>

Log Name: System
Source: volmgr
Date: 2/7/2009 11:10:20 PM
Event ID: 57
Task Category: (2)
Level: Warning
Keywords: Classic
User: N/A
Computer: JDP-Host
Description:
The system failed to flush data to the transaction log. Corruption may
occur.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="volmgr" />
<EventID Qualifiers="32772">57</EventID>
<Level>3</Level>
<Task>2</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2009-02-08T05:10:20.103Z" />
<EventRecordID>17609</EventRecordID>
<Channel>System</Channel>
<Computer>JDP-Host</Computer>
<Security />
</System>
<EventData>
<Data>\Device\HarddiskVolume38</Data>
<Binary>0000000001000000020000003900048000000000850100C00000000000000000
0000000000000000</Binary>
</EventData>
</Event>

Log Name: System
Source: volsnap
Date: 2/7/2009 11:10:20 PM
Event ID: 16
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: JDP-Host
Description:
The shadow copies of volume \\?...014-11dd-b0e5-001517a5c858} were aborted
because volume \\?...014-11dd-b0e5-001517a5c858}, which contains shadow copy
storage for this shadow copy, was force dismounted.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="volsnap" />
<EventID Qualifiers="49158">16</EventID>
<Level>2</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2009-02-08T05:10:20.103Z" />
<EventRecordID>17610</EventRecordID>
<Channel>System</Channel>
<Computer>JDP-Host</Computer>
<Security />
</System>
<EventData>
<Data>\Device\HarddiskVolumeShadowCopy829</Data>
<Data>\\?...014-11dd-b0e5-001517a5c858}</Data>
<Data>\\?...014-11dd-b0e5-001517a5c858}</Data>
<Binary>000000000300300000000000100006C001000000000000004600000000000000
0000000000000000</Binary>
</EventData>
</Event>

Log Name: System
Source: volmgr
Date: 2/7/2009 11:10:20 PM
Event ID: 57
Task Category: (2)
Level: Warning
Keywords: Classic
User: N/A
Computer: JDP-Host
Description:
The system failed to flush data to the transaction log. Corruption may
occur.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="volmgr" />
<EventID Qualifiers="32772">57</EventID>
<Level>3</Level>
<Task>2</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2009-02-08T05:10:20.103Z" />
<EventRecordID>17611</EventRecordID>
<Channel>System</Channel>
<Computer>JDP-Host</Computer>
<Security />
</System>
<EventData>
<Data>\Device\HarddiskVolume38</Data>
<Binary>0000000001000000020000003900048000000000850100C00000000000000000
0000000000000000</Binary>
</EventData>
</Event>

Log Name: Microsoft-Windows-Backup
Source: Microsoft-Windows-Backup
Date: 2/7/2009 11:10:19 PM
Event ID: 9
Task Category: None
Level: Error
Keywords:
User: SYSTEM
Computer: JDP-Host
Description:
Backup started at '{319ff501-a258-491c-a50c-d2aed15f72e7}' failed as Volume
Shadow copy operation failed for backup volumes with following error code
'2155348001'.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Microsoft-Windows-Backup"
Guid="{1db28f2e-8f80-4027-8c5a-a11f7f10f62d}" />
<EventID>9</EventID>
<Version>0</Version>
<Level>2</Level>
<Task>0</Task>
<Opcode>0</Opcode>
<Keywords>0x4000000000000000</Keywords>
<TimeCreated SystemTime="2009-02-08T05:10:19.947Z" />
<EventRecordID>40</EventRecordID>
<Correlation />
<Execution ProcessID="4072" ThreadID="1080" />
<Channel>Microsoft-Windows-Backup</Channel>
<Computer>JDP-Host</Computer>
<Security UserID="S-1-5-18" />
</System>
<EventData>
<Data Name="BackupSetId">{319FF501-A258-491C-A50C-D2AED15F72E7}</Data>
<Data Name="SppErrorCode">2155348001</Data>
</EventData>
</Event>

The VMs on all 6 of the hosts have had their 'Backup (volume snapshot)'
integration service disabled so that the VMs would go into a saved state and
the host backup would not fail. For 2 of the Hyper-V hosts I went back and
checked the shadowstorage for the host, as well as each VM on the host. I
found several of the VMs did not have an explicit shadow volume association
for each volume. So, I made sure each volume on each VM had a mapping to
shadowstorage that was for that volume, as well as being on that volume.
I set the limit for each to be the default 10% of volume size. I also did
the same for each volume on the Hyper-V hosts. I then verified my settings
by running

vssadmin list shadowstorage

on each host and VM. I then enabled the 'Backup (volume snapshot)'
integration service on each VM. The snapshots have been working great and
the backup has not failed on either of the 2 Hyper-V hosts that I fixed.
I'm now going to do the same thing for the other 4 Hyper-V hosts and VMs.

Show quoted text

> The symptoms match, hopefully this will be the solution:
>
> http://support.microsoft.com/default.aspx?scid=kb;EN-US;959962
>
>
> --
> -----------------------------------------------
> Les Connor [SBS MVP]
>
> "Les Connor [SBS MVP]" <(email address - cut out)> wrote in message
> news:OOkFuZ$(email address - cut out)...
>> I've got two hyper-v children, and I'd like this to happen:
>>
>> 1. shadow copies enabled in both children
>> 2. parent backs up with WSB, capturing the children as well.
>>
>> I've got a couple of issues.
>>
>> First, it seems the enabling of shadow copies in the child OS's doesn't
>> survive a restart. That's leading me to believe perhaps it's not supposed
>> to be done, but I haven't found any guidance on this.
>>
>> Second, when attempting to back up the parent, with shadow copies enabled
>> in the children, I received some errors on the host and the backup
>> failed. I also received an error in one of the children, but not the
>> other.
>>
>> I was careful not to have conflicts in the timing of the various shadow
>> copies. The parent does have the hyper-v VSS writer regedits, and shadow
>> copies are enabled on all parent volumes. I used kb958622, but it's not
>> clear to me from that kb whether the requirement to enable shadow copies
>> is referring to the parent, children, or both.
>>
>> I've since disabled shadow copies within the child OS's, and a subsequent
>> backup is running and it appears it will succeed.
>>
>> Are shadow copies in children acceptable practice?
>> Should a WSB of the parent succeed, with shadow copies enabled in the
>> children?
>>
>> Sorry for not posting the event log errors; I'll do so later if need be.
>>
>> --
>> -----------------------------------------------
>> Les Connor [SBS MVP]
>

Post Reply | This is Spam! | Mark as Spam

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