Windows 10: General non specific question on Disk Imaging.

  1. Posts : 1,382
    W10 pro x64 and W8.1 x86
       05 May 2018 #1

    General non specific question on Disk Imaging.

    Years ago when I first started using Acronis (back in Vista days), I always understood that once you restored a disk image from a set of either incrementals or differentials, that if you then attempted to carry on adding new backups to that existing chain that the next incremental or differential would be massive in size because pretty much everything had changed.

    That made sense, like moving all the books on a shelf left or right. Nothing has changed and yet in a way everything has.

    I seem to remember discovering that the hard way by seeing how the next incremental made after restoring an image was almost the same size as the base image.

    Yesterday I tried this again (using AOMEI) and am amazed to see that the next incremental is of a normal small size. Because I knew I would need to do a restore (I wanted a play with some Windows stuff that would break things) I deliberately made a single full backup to restore from.

    Today I thought I would try and add to the incremental chain I had already in place... result, a normal small file size.

    Do all modern backup programs now behave like this ?

    Click image for larger version. 

Name:	Image.PNG 
Views:	0 
Size:	73.8 KB 
ID:	187437
      My ComputerSystem Spec

  2.    05 May 2018 #2

    Hi Mooly,

    Does Aomei use its internal catalog? Does Aomei run from Windows? If yes, system restore may include restoring of Aomei itself & its catalog created before, that is why it continues to work in chain of previous diff/incr backups.

    (Only my thought, I do not use it.)
      My ComputerSystem Spec

  3. Posts : 1,382
    W10 pro x64 and W8.1 x86
    Thread Starter
       05 May 2018 #3

    Yes, it will run from within Windows. That is how it use it 99% of the time.
      My ComputerSystem Spec

  4.    05 May 2018 #4

    Incremental backup can use two approaches to build list of files to backup:

    1. File attribute Archive (the standard approach): it is set by operating system if file is created or changed and cleared by backup software if file is a part of either full or incremental backup (not differential). But in the time of restoring file, backup software can either leave the OS to set the attribute of restored (= created) file or clear it itself, so the size of next incremental backup may be dependent on used software.

    2. Date & time of file creation/change: backup software should set original timestamp while restoring file but some software may behave differently; in this case OS sets new timestamp of restored files and next incremental backup will be much bigger.

    In addition, both approaches can be influenced by internal catalog of files which backup software makes. So the "best practice" is: After system restore, the first following backup should be Full, which starts new Incremental chain.
      My ComputerSystem Spec

  5. Posts : 1,382
    W10 pro x64 and W8.1 x86
    Thread Starter
       05 May 2018 #5

    Thanks for the info on that. I don't know what protocols AOMEI actually uses, I was more just surprised it could pick up as if nothing had happened when continuing with a backup sequence.

    Normally I would always do you as you recommend and start a new sequence off... but I just got curious on this and wanted to see what happened.

    Thanks :)
      My ComputerSystem Spec

  6.    05 May 2018 #6

    You're welcome, Mooly. Unfortunately, I don't use Aomei so I can't give you more accurate info.
      My ComputerSystem Spec


Related Threads
Question about imaging in Backup and Restore
Admittedly I am very lax on doing an image. I did a macrium one prob over a year ago and it took a long time to do my c: (SSD 400 gigs) and f: drive (mechanical HD 2 TB). Lack of spare time stops me doing it. My question is would you guys bother...
Hi all. Are there any complications using disk imaging software with a powered USB 3.0 hub? Do you ever need to bypass the hub and plug a drive directly into the computerís USB port to perform certain tasks? For example, will a USB flash rescue...
General Question in General Support
Guys, I know this is not really about Windows10. However I trust your opinion in matters of tech! So, what I want to know is about my Phone. It has an internal only battery, so I can't remove it. Does this mean that it can always be Tracked??...
Hi and thanks for taking the time to look over my question. I was hoping to solicit some opinions in reference to whether or not defragging a HDD can cause a system image to become corrupted. When I create image back ups using both Macrium and...
Imaging a disk with macrium in Backup and Restore
I have tried several times to make an image of a windows 7 disk.. Using macrium reflect and it just won't do it. It says can't make an image of this disk.. no reason given. On the same computer with another disk that has windows 10, it works...
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd
All times are GMT -5. The time now is 07:35.
Find Us