Incremental Backup

I have made a full backup and 1 incremental backup to an external USB2 HD. When I make the next Incremental backup should I make it from the full backup again or from the last Incremental? Any difference? Thanks.

Phil B.

 

Hello Phil,

Thank you for choosing Acronis Disk Backup Software.

We are very sorry for the delay with the response.

Please take a look at my reply in this previous thread. It should answer your question.

You can find more information on how to use Acronis True Image 9.0 in the respective User's Guide.

You may also find Acronis True Image 9.0 FAQ page helpful.

If you have any further questions concerning Acronis software, please feel free to submit a request for technical support or post any of them on this forum. We will certainly try to help you in resolving any issues.

Thank you.
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Alexey Popov

 

Thanks for the info. As Understood: Once I make a full backup you select the full backup to build on for the first incremental and then I select the last incremental to build on for the next incremental. Each time I want to make an incremental I build on the last incremental I made. Am I thinking correctly? Thanks.

Phil B.

 

No, not exactly.
You can pick any one of the previous files. TI will recognize any one file as being a part of the whole set.

Otherwise, how could you possibly create a scheduled INC backup? You would never know what the last one was named. You just create the task pointing to the FULL and you’re done.

 

The Weaz,

Am a bit confused. If I make a full backup and then an incremental built on the full backup when I make the second incremental if I build on the last incremental won't the second incremental image have what has changed since the last incremental not since the full backup? If I build on the full backup for the second incremental wouldn't the image contain what has changed since the full backup?


Phil B.

 

No. All the files have, for a better choice of words, pointers that will build a list of all the files in the set. If you have a FULL and 7 INCs, you can pick any one of them and the resulting new INC will look exactly the same as it would if you had picked any other.

 

The caveat is this – the first INC must be based on the file name given to the FULL. If you run an INC with an image file name that does not have a matching FULL, that INC task will, in fact, create a FULL.
If the INC was based on an existing FULL, then both files ‘know’ about each other and will take each other into account if a subsequent INC is run that is based on either of them.

 

THe proper way to do this is to define a task for the incremental.
And have the tak point to the FULL backup.

No reason to ever point to an incremental when doing a BACKUP, only when doing a restore.

 

As it has already been pointed out to you, it would not matter where you point in the folder, the changes that are made are backed up in the next increment.

It is only relevant when you try a restore

 

Hello Phil B.,

May be this information will let you to understand the difference between incremental and differential backups.

Thank you.
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Aleksandr Isakov