NetWorker : Windows FS Backup fails with error read failed-volsnap

Sammanfattning: Windows File System Backup fails with error read failed and unrecoverable read file - volsnap event

Den här artikeln gäller för Den här artikeln gäller inte för Den här artikeln är inte kopplad till någon specifik produkt. Alla produktversioner identifieras inte i den här artikeln.
Kolla in andra resurser

Symptom

Backup fails for E:\  drive on a Windows client after running for some hours. No issue with backup for other drives or DR save set.
Error messages in Workflow logs:

--- Job Indications ---
read failed on \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy15\<file with path>: No such file or directory.

Error messages in action logs (/nsr/logs/policy/<policy>/<workflow>/<backup_xxx_logs>/xxx.log):

91579:save: Unrecoverable readfile error captured, backup will not complete.
127945:save: read failed on \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy15\<file with path>: No such file or directory

Orsak

Shadow copy gets created while starting backup but removed before backup completion due to volsnap event .
Windows system event log ID 25.

The shadow copies of volume E: were deleted because the shadow copy storage could not grow in time.  Consider reducing the IO load on the system or choose a shadow copy storage volume that is not being shadow copied.

Windows Storage controller driver and firmware were not updated and there was another local backup used to run on the E:\ drive during NetWorker backup. However, updating driver/firmware and changing NetWorker backup start time after local backup completion didn't resolve the problem.
 

Upplösning

The drive size was around 7TB with 2.3 TB of free space. The storage for the shadow copy was set to 700GB.
The issue was resolved after increasing the shadow copy storage to 1.2TB

Ytterligare information

NetWorker: Troubleshooting Backup Failures Due to VSS Issues

Berörda produkter

NetWorker
Artikelegenskaper
Artikelnummer: 000217935
Artikeltyp: Solution
Senast ändrad: 06 jan. 2026
Version:  1
Få svar på dina frågor från andra Dell-användare
Supporttjänster
Kontrollera om din enhet omfattas av supporttjänster.