Failed to create a vss snapshot required to run a system state backup - Different Hyper-V Hosts (but same OS version), three different Guest VM OS's.

 
<strong>Backup</strong> fails with. . Failed to create a vss snapshot required to run a system state backup

Cannot create a shadow copy of the volumes containing writer's data. 16 ago 2021. Sep 28, 2020 · Examine the events that are logged during the backup operation to help determine which component is failing. Production checkpoints cannot be created for 'VM'. --tr:Failed to perform pre-backup tasks. A VSS critical writer has failed. Known Issues. Jul 1, 2015 · Creating Volume Snapshot - Please Wait Failed: Code: 0x8004231f - Retrying without VSS Writers ERROR: COM call "m_pVssObject->BackupComplete (&pAsync)" failed. To resolve the issue, the procedure is always the same: - User "vssadmin list writers" to detect one which is not in 'stable' state. Note: To create other backup, you can choose Disk Backup, File Backup, Partition Backup in the given picture above. Instance ID: [ {3022ed16-d4d6-4026-a9e0-ce5e36132b7b}]. begin backup Initiate Shadow Copy creation and observe the outcome. Note : The most common source for VSS errors is Volsnap. Error code: 2147754766 (0x8004230E). The backup run fine but we saw this error being logged: Volume Shadow Copy Service error: Unexpected error querying for the IVssWriterCallback . Causes The size of the shadow copy storage area on the volume is not large enough to store data for shadow copies or the free physical space of the volume is less. Set the Start type to “Manual” and click Apply. Attempting to create snapshot. (HRESULT = 0x8004230f) There is only one VSS provider in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\VSS\Providers\. writer verify VSS_writer_name Enter the following command to cause the VSS writers to be notified that a backup is occurring. - If backup is running you will need to wait for the backup to complete and check the status of the writers afterwards. 2 Volume with shadow storage should have sufficient free space. In the Advanced settings section, choose Windows VSS. After starting the command the ESENT event-IDs occur is this order: 2001, 2001, 2003, 2006, 2003, 2006, then there is the VSS event 8229 with error 0x800423f4,. Click where the arrow points and select a path for your backup. If we find the writers stable and still backups fail, or we get errors, please do not perform this step. Some backup types require that the Windows System Administrator enable or register the appropriate VSS Writers. The output if you run the vssadmin list writers command is as follows: vssadmin 1. Aug 18, 2018 · Creating VSS snapshot Error: Failed to create snapshot: Backup job failed. Cannot create a shadow copy of the volumes containing writer's data. KB1855: Hyper-V Guest processing skipped (check guest OS VSS state and integration components version) Hyper-V backups report guest processing error Veeam logo Downloads Close Contact us Contact Sales Technical Support Sign in Close My Account My Cases Sign out Menu Products Veeam Platform Single Platform to Protect ALLWorkloads. ao; du. You can also try manually create a VSS snapshot using the following series of commands (assuming F: is the correct target) diskshadow /l c:\windows\temp\vsslog. Instead of restarting the server, you can restart the services for each of the failed VSS writers, as described in the following procedure. Causes VSS writers fail for various reasons. If the shadow copy is created successfully, the final step is to send the following command to notify the writers that a backup has occurred. Note: To create other backup, you can choose Disk Backup, File Backup, Partition Backup in the given picture above. Click where the arrow points and select a path for your backup. widevine l1 cdm github. Then, click System Backup under the Backup tab. To install Windows Server Backup using Server Manager, perform the following steps: In Server Manger, select Add roles and features. VSS OTHER: ERROR VSS failed to process snapshot: A function call was made when the object was in an incorrect state for that function 90108:save: Unable to save the SYSTEM STATE save sets: cannot create the snapshot. 86024:save: Error occurred while saving disaster recovery save sets. : C:) and deletion of oldest snapshot simply removes the single, oldest snapshot on the system. This disk space can be reclaimed by using the vssadmin command in an elevated MS-DOS command. If the Service status is "Stopped", click the "Start" button to change. Operation: [Shadow copies commit]. --tr:Failed to create VSS snapshot. If we find the writers stable and still backups fail, or we get errors, please do not perform this step. Run vssadmin list providers and report back the result (please do not modify the output when pasting them here). (HRESULT = 0x8004230f) There is only one VSS provider in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\VSS\Providers\. xml VSS OTHER: ERROR: VSS failed to process. Snapshot provider error (0xE000FE7D): Access is denied. Click where the arrow points and select a path for your backup. Click where the arrow points and select a path for your backup. 2 Volume with shadow storage should have sufficient free space. 468591 VSS OTHER: No writers detected for this VSS saveset 174424:save: Step (3 of 7) for PID-944: Creating the snapshot for the selected save sets. Writer name: [NTDS]. Aug 18, 2018 · Creating VSS snapshot Error: Failed to create snapshot: Backup job failed. xml VSS OTHER: ERROR: VSS failed to process. Case history here at Commvault does show some cases where the maintenance mode activity became stuck on the ESX host and this needed to be resolved in VMware before successful backups could be taken. for resolving this issue we need to make. In the event viewer Application event log the wbadmin start systemstate command registers an error for application Backup with Event-ID 521 and error number 2155348129. Some backup types require that the Windows System Administrator enable or register the appropriate VSS Writers. Then, click System Backup under the Backup tab. Accept Reject yk. Run regedit. In the Backup Operators Properties window, click Add. Accept Reject yk. Check the Windows Event Viewer for details. Backups are failing and event viewer gives me these errors: Event 521 - Backup started at '29/11/2013 11:30:42 AM' failed as Volume Shadow copy operation failed for backup volumes. In my case it was Hyper-V IC Software Shadow Copy. If a Windows server has a high rate of change it requires larger than normal disk space for the Shadow Copy Storage. System state backup is skipped. Instead of restarting the server, you can restart the services for each of the failed VSS writers, as described in the following procedure. 18 ago 2018. wl; gr. Jun 28, 2012 · The failure appears to be occurring due to an inaccessible volume path being reported by the System State System Files VSS Writer. Cannot create a shadow copy of the volumes containing writer's data. Go to Software Environment > Services and sort the grid by Path. exe and navigate to "HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\VSS\Settings" Create a new. 18 ago 2014. When the snapshot is created, any Volume Shadow Copy Service (VSS) writer associated with the volume is called. Ensure that all provider services are enabled and can be started. About VSS technology. It will display your Shadow storage space. Exclude the partition from the backup. - Returned HRESULT = 0x80042301 - Error text: VSS_E_BAD_STATE Gathering Windows Events - Please Wait Backup aborted! - Failed To Create Volume Snapshot. Sep 27, 2011 · When performing a system state backup of this media server, the job fails with a VSS error. Click where the arrow points and select a path for your backup. kenshi uwe kaizo. Solution 3 - Remove old VSS snapshot s. create vmid [snapshotName] [snapshotDescription] [includeMemory] [quiesced]. 1 Windows VSS services should be running. Known Issues. --tr:Failed to perform pre-backup tasks. Failed to create a VSS snapshotand it is requiredin order to run a system state backup. Hi Marc, Please try the steps below to troubleshoot the issue: 1. Apr 5, 2021 · When VSS is invoked, all VSS providers must be running. Running the command 'vssadmin list shadows' will display a list of snapshots on your system along with associated ID. Can you clarify, do you have a Scale-out File Server cluster running Windows Server, or are your Hyper-V hosts talking to NetApp directly via SMB?. In the text field of the dialogue box, type cmd and press Ctrl + Shift + Enter keys to launch elevated Command Prompt. --tr:Failed to perform pre-backup tasks. If any of the VSS writers encounter an error, the entire backup job will fail. Note : The most common source for VSS errors is Volsnap. Log In My Account ex. If the above steps do not resolve the issue, contact Datto Technical Support. Initiate Shadow Copy creation and observe the outcome. Yes, There is FAT32 system in physical server as below: VMware KB ( VMware Knowledge Base ) says to uncheck FAT volume or convert to NTFS. On the dashboard, choose the type of backup you want to create, either Create an on-demand backup or Manage Backup plans. log: NOTE: all other virtual server backups work fine icon Best answer by Stuart Painter Hi @Mostafa Amin Thank you for the question. In the Command Prompt window, type the command mentioned below and hit Enter to execute it. Install AOMEI Backupper and launch the main interface. Reboot the protected machine. Then, click System Backup under the Backup tab. Log In My Account ex. Activity on a volume is preventing all volumes from being snapped. Mar 19, 2019 · FAILED: Unable to create a VSS snapshot of the source volume (s). How to create a VSS backup step by step without any problem. Click where the arrow points and select a path for your backup. Then, click System Backup under the Backup tab. Failed to create a vss snapshot required to run a system state backup xb Fiction Writing Jul 10, 2018 · Go to the Reports > Backup page, and select the following options in the filter section above the table: Schedules – Select All Sources – Select Agent directly below the Source in question From – Specify a date View the list of reports. Accept Reject yk. System state backup is skipped. This step is performed only when we find the VSS writers in a failed state. Then, select a drive and click Configure. Macrium Reflect uses shadow storage space for system restore points. Step 3: Find Volume Shadow Copy and choose Properties from the right-click menu. - These steps are at the bottom of the page. txt set verbose on set context volatile add volume F: begin backup create end backup This will help determine where the issue resides. The Microsoft Volume Shadow Copy Service (VSS) snapshot provider selected returned: "Unexpected provider error". (HRESULT = 0x8004230f) There is only one VSS provider in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\VSS\Providers\. You see the error: An error occurred while quiescing the virtual machine. If the command successfully completed, but a specific volume backup failed, you can troubleshoot the failure in the list of EBS snapshots. 4 VSS writers should be enabled and in consistent state. Install AOMEI Backupper and launch the main interface. Step 3: Find Volume Shadow Copy and choose Properties from the right-click menu. If any of the VSS-Aware applications are in an unstable state you need to troubleshoot the individual writer and error, ORFor Server 2003 or Earlier ONLY: Manually reset the state of the VSS Writers. the first step is check on VSS providers, but when I run the suggested command (vssadmin list providers), a DOS window opens and closes so quickly that I can't even read it. · How : Open Event-Viewer and review at the logs at: Windows LogsApplication where the source is Backup. Run the command vssadmin list shadows to display a list of snapshots on your system with associated IDs. Failing the scan. Writer name: [NTDS]. If there is an issue with any third-party providers or the VSS service itself, the snapshotVSS service itself, the. Then, select a drive and click Configure. Reboot the protected machine. Vss error: '0x800423f4' --tr:Failed to verify writers state. - Type: VSS_CT_FILEGROUP [2] - Is selectable: FALSE - Is top level: TRUE - Notify on backup complete: FALSE - Components: - Paths affected by this. It captures and creates snapshots of your system called shadow copies. 3 Backup settings should be configured to use VSS snapshot. Jul 27, 2021 · Failed to create snapshot (Compellent Replay Manager VSS Provider) (mode: Veeam application-aware processing) Details: Unknown status of async operation. The Microsoft Volume Shadow Copy Service (VSS) snapshot technology selected returned: "Unexpected provider error". If we find the writers stable and still backups fail, or we get errors, please do not perform this step. (HRESULT = 0x8004230f) There is only one VSS provider in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\VSS\Providers\. Known Issues. 2 Volume with shadow storage should have sufficient free space. Examine the results that are returned to locate the Exchange Writer results. ol; zk; Website Builders; dv. Review following technotes for VSS troubleshooting: Functionality and dependency of VSS (Volume Shadow Copy Service) in Backup Exec and System Recovery. Search articles by subject, keyword or author. Before verifying a VSS quiescing issue, ensure that you are able to create a manual non-quiesced snapshot using the vSphere Snapshot Manager. Please refer VSS Event logs for more details. If you're using CommVault you'll see the VSS Snapshot error on File system backups. Solution Examine the Application and System Event logs for more detailed information about the errors. xml VSS OTHER: ERROR: VSS failed to process. After disabling system protection, all the system restore points and its volume shadow copy will be deleted. Install AOMEI Backupper and launch the main interface. Error code: 2147754766 (0x8004230E). Then, click System Backup under the Backup tab. Creating VSS snapshot Error: Failed to create snapshot: Backup job failed. Executing "vssadmin list providers" shows there is only Microsoft providers and the StorageCraft provider installed. Writer name: [NTDS]. 30 dic 2020. Tick Disable system protection and click Apply > OK to exit this window. Note: To create other backup, you can choose Disk Backup, File Backup, Partition Backup in the given picture above. This article applies to: Solution: First, refer to the Carbonite Server User Guide and ensure that all requirements for backup are met. Note: To create other backup, you can choose Disk Backup, File Backup, Partition Backup in the given picture above. Locate the service named Volume Shadow Copy. log 06/09/2013 18:01:19 ANS5250E An unexpected . How to create a VSS backup step by step without any problem. so please check disk space. The cause presented by the software for the VSS failure is usually correct, however, the software can only make an educated guess as to what the VSS problem is. VSS writers 1> System writers and 2>WMI writers are in failed state, The main cause is no space in local drives. create If the shadow copy is created successfully, the final step is to send the following command to notify the writers that a backup has occurred. Before verifying a VSS quiescing issue, ensure that you are able to create a manual non-quiesced snapshot using the vSphere Snapshot Manager. Check the Windows Event Viewer for details. Failed to create a VSS snapshot and it is required in order to run a system state backup. Note : To create other backup, you can choose Disk Backup, File Backup, Partition Backup in the given picture above. Both the Host and the Guests have the Microsoft Hyper-V VSS Writer in a failed state. for resolving this issue we need to make. 14 sept 2012. Step 2: Type msc to enter service interface. see Microsoft article [Error Code 17:55 Failed to create a VSS snapshot and it is required in order to run a system state backup. VSS asynchronous operation is not completed. --tr:Failed to perform pre-backup tasks. In the Command Prompt window, type the command mentioned below and hit Enter to execute it. what can someone do with my email address. It indicates, "Click to perform a search". Provider name: 'StorageCraft Volume Snapshot Software Provider'. Install AOMEI Backupper and launch the main interface. Best way is to reboot the box. Sep 15, 2022 · VSS-based system state backup fails after you uninstall or upgrade a program Backups fail and Event ID 12293 Memory leak in the Virtual Disk Service Parallel backup operation may fail The startup time increases or hangs at the logon “Welcome” screen if you frequently backup Hyper-V virtual machines on a Windows Server 2008 R2 system. --tr:Failed to perform pre-backup tasks. Thanks in advance. About VSS technology. Symptom1: When using Microsoft VSS and Hyper-V with Windows 2008 R2, the Job Details Status Window shows the following message: Error Code:. Writer name: [NTDS]. shut yo skin tone chicken bone google chrome no home flip phone disowned ice cream cone lyrics. It will display your Shadow storage space. Failed to create a vss snapshot required to run a system state backup. Run the command vssadmin list shadows to display a list of snapshots on your system with associated IDs. Nov 12, 2021 · Press Windows + R key to start Run. 22 jul 2022. The backup-archive client uses VSS to back up all system state components as a single object, to provide a consistent point-in-time snapshot of the system . 2 Volume with shadow storage should have sufficient free space. It is also worth mentioning that the System Writer was not in a failed state after the attempt to backup system state with the Windows backup utility. dll plugin failed to load correctly. Click Groups. Press Windows + R key to start Run. Note : To create other backup, you can choose Disk Backup, File Backup, Partition Backup in the given picture above. The notification contains following details: Creating VSS snapshot Error: Failed to create snapshot: Backup job failed. The information below is from the Backup Exec 2010 logs and Windows application event log that were reported as a result of the failed BE 2010 backup job:. If any of the VSS writers encounter an error, the entire backup job fails. Exclude the partition from the backup. It also fails. If not all volumes are selected for backup, go to backup settings and deactivate the multi-volume snapshot. Step 2. Solution Examine the Application and System Event logs for more detailed information about the errors. When Windows Server backup attempts to back up a disk volume, a Volume Shadow Copy Snapshot is created for the volume. Both the Host and the Guests have the Microsoft Hyper-V VSS Writer in a failed state. Sep 24, 2021 · When you open an administrator command prompt and create a VSS diskshadow snapshot in Windows Server 2012 R2, the output may contain an error: Commands: Console DISKSHADOW> add volume c: DISKSHADOW> create Output: COM call "lvssObject4->GetRootAndLogicalPrefixPaths" failed. When VSS is invoked, all VSS providers must be running. When you open an administrator command prompt and create a VSS diskshadow snapshot in Windows Server 2012 R2, the output may contain an error: Commands: Console DISKSHADOW> add volume c: DISKSHADOW> create Output: COM call "lvssObject4->GetRootAndLogicalPrefixPaths" failed. You can perform error checking on a volume by running chkdsk /f or chkdsk /r on it. Deletion by ID must specify a valid snapshot ID, deletion by volume must specify a valid Windows volume (e. Known Issues. xildhibaanada jubaland iyo qabiilada aqalka hoose

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You will have to get creative to get the VssAdmin list Shadows when the "other" user is running. . Failed to create a vss snapshot required to run a system state backup

Set the Start type to “Manual” and click Apply. Running the command 'vssadmin list shadows' will display a list of snapshots on your system along with associated ID. Critical error: Unable to create VSS snapshot. Set the Start type to “Manual” and click Apply. To resolve the issue, the procedure is always the same: - User "vssadmin list writers" to detect one which is not in 'stable' state. Click where the arrow points and select a path for your backup. Step 3: Find Volume Shadow Copy and choose Properties from the right-click menu. When VSS is invoked, all VSS providers must be running. Apr 5, 2021 · While taking a snapshot, you see the error: Cannot create a quiesced snapshot because the snapshot operation exceeded the time limit for holding off I/O in the frozen virtual machine You experience this issue when you are doing a hot clone of a virtual machine. Then, click System Backup under the Backup tab. Take hard drive backup as an example. After searching, I know this error is related to Volume Shadow Copy Service that can not convert FAT32. If any of the VSS writers encounter an error, the entire backup job will fail. Class ID: [ {b2014c9e-8711-4c5c-a5a9-3cf384484757}]. But I have had success in making the VSS service run correctly . Step 3: Find Volume Shadow Copy and choose Properties from the right-click menu. Critical error: Unable to create VSS snapshot. Cannot create a shadow copy of the volumes containing writer's data. Before verifying a VSS quiescing issue, ensure that you are able to create a manual non-quiesced snapshot using the vSphere Snapshot Manager. FAILED: Unable to create a VSS snapshot of the source volume (s). Attempting to create snapshot. Install AOMEI Backupper and launch the main interface. Best way is to reboot the box. · How : The event in previous step will usually indicate which layer or application caused the failure. Select File Server VSS Agent Service. Check if the SharePoint Search is working as expected/ Check if any issues in the Search service/Search Administration pages in the SSP >> Fix any issues if present 2. Press Windows + R key to start Run. When Windows Server backup attempts to back up a disk volume, a Volume Shadow Copy Snapshot is created for the volume. create vmid [snapshotName] [snapshotDescription] [includeMemory] [quiesced]. 3 Backup settings should be configured to use VSS snapshot. Macrium Reflect was working perfectly for years, until February 9, 2020 - that's when backups started to fail. begin backup Initiate Shadow Copy creation and observe the outcome. 468591 VSS OTHER: No writers detected for this VSS saveset 174424:save: Step (3 of 7) for PID. Insufficient free space on volume. Low storage space – If you have allocated low storage space to VSS, it. Failing the scan. com%2fen-us%2ftroubleshoot%2fwindows-server%2fbackup-and-storage%2fbackup-fails-vss-writer/RK=2/RS=lMhQG02cV4SPszDiS0xq7BdRI98-" referrerpolicy="origin" target="_blank">See full list on learn. : C:) and deletion of oldest snapshot simply removes the single,. If we find the writers stable and still backups fail, or we get errors, please do not perform this step. Attempting to create snapshot. Running the command 'vssadmin list shadows' will display a list of snapshots on your system along with associated ID. Check the event log for failure events logged by Windows Server Backup. Solution 3 - Remove old VSS snapshot s. Thus, the best solution is to set this service to Automatic. Windows VSS backup is currently supported for EC2 instances only. 11/29/2013 10:35:04 PM Vss Writer. If there is an issue with any third-party providers or the VSS service itself, the snapshot operation may fail. Note: To create other backup, you can choose Disk Backup, File Backup, Partition Backup in the given picture above. ol; zk; Website Builders; dv. 468591 VSS OTHER: No writers detected for this VSS saveset 174424:save: Step (3 of 7) for PID-944: Creating the snapshot for the selected save sets. The VSS Requestor in the backup program submits a request to VSS to prepare the selected Exchange storage groups for a snapshot backup. Nov 17, 2021 · Open an administrator command prompt and enter the following syntax to remove the shadow copies: vssadmin delete shadows /all Ensure the latest VMware Tools or Hyper-V Integration Services are installed if the system is a virtual machine. save: Step (3 of 5) for PID-7580: Creating the snapshot for the selected save sets. When VSS is invoked, all VSS providers must be running. Case history here at Commvault does show some cases where the maintenance mode activity became stuck on the ESX host and this needed to be resolved in VMware before successful backups could be taken. Error code: '32770'. exe and navigate to "HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\VSS\Settings" Create a new. To get a list of virtual machines and their VMID, run the command: vim-cmd vmsvc/getallvms To set the quiescing to 0, run the command: vim-cmd vmsvc/snapshot. System error: 'QueryStatus () failed'. Step 4: Change the Startup type to Automatic. Check if the SharePoint Search is working as expected/ Check if any issues in the Search service/Search Administration pages in the SSP >> Fix any issues if present 2. Backup fails with. When the snapshot is created, any Volume Shadow Copy Service (VSS) writer associated with the volume is called. When you perform a system state backup using Windows Server Backup on Windows Server 2008, the backup fails with the following error: Backup of system state failed [ <DateTime>] Log of files successfully backed up. 468591 UTF8 string for BCDPath is C:\Program Files\EMC NetWorker\nsr\tmp\xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxx\backcomp. Mar 10, 2011 · If no backups currently running run: vssadmin list writers If System writer is in status [5] Waiting for completion you need to address that first in order to be able to run any File System backup. Open AWS Tools for Windows PowerShell and run the. When the snapshot is created, any Volume Shadow. At the same time we get an message in the. Oct 19, 2009 · If any of the VSS-Aware applications are in an unstable state you need to troubleshoot the individual writer and error, ORFor Server 2003 or Earlier ONLY: Manually reset the state of the VSS Writers. Entering snapshot definition phase. When you perform a system state backup using Windows Server Backup on Windows Server 2008, the backup fails with the following error: Backup of system state failed [ <DateTime>] Log of files successfully backed up. Before verifying a VSS quiescing issue, ensure that you are able to create a manual non-quiesced snapshot using the vSphere Snapshot Manager. Here is a known issue about using IBM TSM backup to do a system state. 468591 VSS OTHER: No writers detected for this VSS saveset 174424:save: Step (3 of 7) for PID-944: Creating the snapshot for the selected save sets. In the Confirm installation selections, verify that File Server and File Server VSS Agent Service are listed, and click Install. Running the command 'vssadmin list shadows' will display a list of snapshots on your system along with associated ID. Thanks in advance. 468591 UTF8 string for BCDPath is C:\Program Files\EMC NetWorker\nsr\tmp\xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxx\backcomp. Check the Windows Event Viewer for details. When you're assigning resources, choose EC2. Note: To create other backup, you can choose Disk Backup, File Backup, Partition Backup in the given picture above. Set the Start type to “Manual” and click Apply. Failing the scan. Search articles by subject, keyword or author. (4630) Failed to create the NetWorker ASR directory; Failed to get the save set list for volume <%s> (20723) Failed to get the volume information for volume <%s> because: <%s> (20722) Failed to get writers list for <save_set. After searching, I know this error is related to Volume Shadow Copy Service that can not convert FAT32. In Computer Management: Expand Local Users and Groups. 2 Volume with shadow storage should have sufficient free space. Cannot create a shadow copy of the volumes containing writer's data. Critical volumes are those volumes that ASR must restore. the first step is check on VSS providers, but when I run the suggested command (vssadmin list providers), a DOS window opens and closes so quickly that I can't even read it. Cannot create a shadow copy of the volumes containing writer's data. If you're using CommVault you'll see the VSS Snapshot error on File system backups. : C:) and deletion of oldest snapshot simply removes the single, oldest snapshot on the system. Failed to create a vss snapshot required to run a system state backup.