You are installing Agent on a Windows 2003 or Windows 7 machine.
The installer shows the following warning:
The KB940349 update is not installed on this machine. Install this update to avoid disk backup failures
An outdated VSS version is installed on the machine. To guarantee correct backup functioning, we always recommend updating VSS components to the latest available versions.
Backup task hangs at "Calculating time remaining..."
This article applies to backups of Hyper-V VMs performed by Agent for Hyper-V (agent-less)
Prerequisites
Prior to performing the backup, make sure that the below prerequisites are met:
1. Hyper-V Integration Services must be up-to-date and running inside the virtual machine(s).
Backup fails with:
Windows error: (0x800705AA) Insufficient system resources exist to complete the requested service
While using the VSS backup option to back up complex applications, you may encounter issues with creating volume snapshot/shadow copy. This article provides instructions on how to troubleshoot and resolve such issues.
Problems detected that may cause a VSS snapshot failure. Trailing spaces in the path. To remove the trailing spaces, run the T-SQL command: ALTER DATABASE MODIFY FILE
Activity fails with one of the following errors:
Windows error: (0x800705B4) This operation returned because the timeout period expired
or
Operating system error: This operation returned because the timeout period expired
Backup fails with:
Windows error: (0x8007001F) A device attached to the system is not functioning
Backup fails with:
Unknown status
Backup fails with:
Windows error: (0x80070015) The device is not ready
Backup with activated Volume Shadow Copy fails with the following error similar:
The backup has failed because 'VSS Writer' has failed during snapshot creation.
This error can be produced by different VSS writers, see some examples below:
Backup fails with:
The backup has failed because 'VSS Writer' has timed out during snapshot creation
OR
Windows error: (0x800423F2) VSS writer 'System Writer' with class ID 'E8132975-6F93-4464-A53E-1050253AE220' has timed out. This may be caused by too intensive I/O on the machine at the backup start time. Try to re-schedule the backup to some different time. To troubleshoot VSS issues, download and run Acronis VSS Doctor available at https://www.acronis.com/en-us/personal/vss-diagnostic-free-tool/
