According to industry definitions, effective virtual backup solutions typically include:
Beyond the 64-bit computing context, the number "64" also appears in technical specifications for virtual backup operations. In Microsoft SQL Server's Virtual Backup Device Interface (VDI), the MAXTRANSFERSIZE parameter—which determines the maximum input or output request size issued by SQL Server to a virtual backup device—has a default value of and must be a multiple of 64KB. The range for this parameter extends from 64KB through 4MB. virtual backup 64