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VHDX Conversion much smaller

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I have a full backup and one incremental backup. The size all together is 1,9TB. If I convert the two .tib to vhdx, I get 2x3 VHDX, 3 for each backup date, with a size of ~ 600 GB. So 1,9 TB in .tibs result in 1,2 TB of .vhdxs

How is that possible? I would expect that the sum of vhdx file sizes is at least the file size of the corresponding .tib(s). It may be lager (compression, less redundancy due to incremental backup) but how can it possibly be smaller?

 

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Welcome to these User Forums.

From reading the ATI 2018 User Guide: Converting Acronis backup information, in particular the 4th bullet point:

Select the backup version that you want to convert.

Converting an incremental backup requires all the previous incremental backups and the original full backup. Converting a differential backup requires the original full backup. The result of conversion is always a full backup.

This suggests to me that any changes recorded in your incremental backup are applied to the converted VHDX file, thus the end file size will be less that the combined size of the full plus incremental file sizes added together.

Thank you. I think you misunderstood my question slightly. The image contains 3 partitions and I created vhdx of both backup versions. Thats why 2 .tib files result in 3x2 vhdx files. Otherwise I would have written about 6 vhdx files.

Sorry, I am only able to point you to the User Guide information here.  I have never needed to convert any .tib images to .VHDX and would have no use for doing so as don't have the hardware capable of booting from the latter.

well, I would prefer a RAW image or vhd as well (which is RAW+ small footer), but afaik Acronis TI does only offer conversion to vhdx - and as tib is a proprietary format....

VHDX is the conversion by default.  Once you select the option to convert the VHD and then click the Convert button you will be presented an Explorer window so you can specify where to save the output file to.  Look at the File Type being saved and you will see it is Windows backup file (VHDX)

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Hi,

According to the information shared by devs, the type of the resulting image .vhd or .vhdx solely depends on the OS in the converted backup. 

  • VHDX virtual disk is created in Windows 10
  • VHD virtual disk is created for Windows Vista, 7, 8, 8.1

Thanks Ekaterina, I wondered about that being the case, I wonder no more!