Error 0x70021: Failed to create volume snapshot
Hi
I have been using acronis True image for many years, I'm actually with 2021 version runnig in WIndows 10 21H2.
It's been a short time that I have big problems in backing up my system that I have planned weekly. before starting the backup successfully, I recieve 3 emails with this content:
2021-11-22T11:10:06:148+01:00 25132 I00000000: -----
2021-11-22T11:10:06:148+01:00 25132 I00000000: ATI Demon started. Version: 25.8.1.39216.
2021-11-22T11:10:06:185+01:00 25132 I00640000: Attributi della copia di riserva del backup: format tib; need_reserve_backup_copy false;
2021-11-22T11:10:06:186+01:00 25132 I00640002: Operazione Samsung SSD 870 EVO 500GB SVT01B6Q avviata con pianificazione.
2021-11-22T11:10:06:758+01:00 25132 I00640000: Attributi della copia di riserva del backup: format tib; need_reserve_backup_copy false;
2021-11-22T11:10:06:758+01:00 25132 I013C0000: Operazione: Backup
2021-11-22T11:11:11:572+01:00 25132 E00070021: Error 0x70021: Failed to create volume snapshot.
| livello traccia: errore
| line: 0x8ba4fa0bac28c272
| file: e:\jenkins_agent\workspace\ati-disk_backup\734\product\main\core\resizer\archive3\backup_partition.cpp:1311
| funzione: resizer::Archive3ImageBuilder::BackupPartitions
| line: 0x8ba4fa0bac28c272, e:\jenkins_agent\workspace\ati-disk_backup\734\product\main\core\resizer\archive3\backup_partition.cpp:1311, resizer::Archive3ImageBuilder::BackupPartitions
| $module: disk_backup_vs_734
|
| error 0x10c449: Failed to lock the volume snapshot.
| line: 0x3fec04e376b8a236
| file: e:\jenkins_agent\workspace\ati-disk_backup\734\product\main\core\fdisk\win_snapshot.cpp:1344
| funzione: win_snapshot_core::CallSbLock
| line: 0x3fec04e376b8a236, e:\jenkins_agent\workspace\ati-disk_backup\734\product\main\core\fdisk\win_snapshot.cpp:1344, win_snapshot_core::CallSbLock
| $module: disk_backup_vs_734
|
| error 0x9: Stato sconosciuto.
| line: 0x2aacb7b2ab852ac
| file: e:\jenkins_agent\workspace\ati-disk_backup\734\product\main\core\fdisk\ver2\arch\windows\win_errors.cpp:40
| funzione: Fdisk::AddKstatusError
| line: 0x2aacb7b2ab852ac, e:\jenkins_agent\workspace\ati-disk_backup\734\product\main\core\fdisk\ver2\arch\windows\win_errors.cpp:40, Fdisk::AddKstatusError
| code: 0xe000006d
| $module: disk_backup_vs_734
|
| error 0xfff0
| line: 0xbd28fdbd64edb8f1
| file: e:\jenkins_agent\workspace\ati-disk_backup\734\product\main\core\common\error.cpp:307
| funzione: Common::Error::AddWindowsError
| line: 0xbd28fdbd64edb8f1, e:\jenkins_agent\workspace\ati-disk_backup\734\product\main\core\common\error.cpp:307, Common::Error::AddWindowsError
| code: 0xe000006d
| $module: disk_backup_vs_734
2021-11-22T11:11:11:642+01:00 25132 E013C0005: Error 0x13c0005: Operazione completata senza errori.
| livello traccia: errore
| line: 0x9f2c53c72e8bcedb
| file: c:\jenkins_agent\workspace\ati-main-win-ati\62\products\imager\demon\main.cpp:741
| funzione: main
| line: 0x9f2c53c72e8bcedb, c:\jenkins_agent\workspace\ati-main-win-ati\62\products\imager\demon\main.cpp:741, main
| $module: ti_demon_vs_39216
It takes 3 attempts with Error 0x70021 before starting and ending the back successfully.


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Pietro,
In addition to chkdsk as Steve suggests, I would also run from an admin command prompt the following two commands:
- DISM /Online /Cleanup-Image /RestoreHealth
- sfc /scannow
Run the VSS Doctor tool again after the above. If problems persist and if you are running an SQL database it is possible that hi disk load is a problem. VSS doctor can detect that.
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