Parallels Virtualization and Automation Software

SYMPTOMS

VE backup fails with the following error:

#2502 SWAHaulControlOperator with id 'swabackup_serializer' stage 'MakeImageBack up' failed : Error:458756; Write error;

RESOLUTION

This issue was fixed in Virtuozzo update 35154. Please run Virtuozzo Update Wizard and install Virtuozzo updates up to VZU35154

Additional information

Once update is installed but the issue still takes place please do the following:

1. Check if there is enough disk space on backup location

2. Try to change MaxWiteSize value in the registry:

HKLM\Software\SWSoft\Virtuozzo\Backup

MaxWriteSize REG_DWORD 0x8000  (or 0x4000, or 0x1000)

DWORD, size in bytes,  (0 for unlimited or >= 0x1000 for limit)

Recommended values: 0x8000, if it does not help, than 0x4000 , then 0x1000

The lower value might decrease performance (backup speed), but it will increase backup success rate.