Acronis Backup taking very long time
Whenever I use Acronis True Image to do about a 3TB Differential Backup it always takes days upon days to do. I've run into in the past, always seems to be an issue with this program. Why is this?


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Thanks for your reply Steve. I switched over to a partition/drive backup instead which is quite a bit quicker, approximately a day as opposed to over 4 days. Do you know if any of the differential backups can be deleted as time goes on? Or does it need all the backup from the last one following back to the initial original backup? Thanks.
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Greg, the differential backups can be deleted but only by using the Clean up versions tool due to the metadata linkages that exist between these files in ATI 2020 & later versions.
See KB 61844: Acronis True Image 2019, 2020 and 2021: How to delete old backups
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With Acronis True Image 2020, I am seeing my FULL backups (2.7 TB) take 7 hours 41 minutes when backing up to an external USB hard drive.
This seems really slow. What steps can I take to speed this up?
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Andrew,
Unfortunately a backup of 2.7TB of data is going to take time. The most immediate change you can make is to reduce the size of the amount of data that the task you have created to do this backup is handling. It is possible to have multiple backup tasks and although it may not be ideal to split up all this data doing so will reduce the time it takes for the task to complete.
Beyond that it boils down to hardware. If you are using a case mounted USB port connection for your external drive, try an I/O mounted port if one is available these are generally faster. You can also purchase an external disk that meets High-Speed USB requirements which will greatly boost the speed at which the task can complete.
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How would I go about making multiple backup tasks? I want a total backup of my C: drive... I am not sure how to split that apart.
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Andrew, how many disk drives do you have in your PC, and for those drives, how many partitions are present on each disk.
Personally, I try to only keep the Windows OS and installed applications on my C: drive / partition, then I use separate partitions / drives for storing other user data. This allows me to have separate backup tasks for different type of data, and different backup schedules according to how frequently data changes.
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Similar issue here: 7TB of storage with ~ 3 TB used. Connected to 14TB Easystore via USB 3.0.
Takes over 24 hrs, plus it shows over 10TB of data backed up. It's backing up more data then I have.
Any idea what's up with that.
Thanks,
Pat
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Patrick, welcome to these public User Forums.
Sorry but without full details of your backup task / configuration options etc then all we could do is make guesses!
One potential cause of excessive sized backups is if the free space map for the source file system has errors. Running CHKDSK /F should identify and resolve such issues.
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Hi,
I'm a new user of ATI, moved over from Macrium. However, that took < 1 hour to create a full backup of one 2TB m.2 (which has only 648GB used).
I do full backups each day to a SATA drive in the same PC. ATI took 1.5 Hours on the first day, and subsequent backups are taking longer each day, today I'm on my 6th day, again each day is the same as the first, a full backup, I'm coming up to hour 6 and it's still only at 87%.
I've given the process a higher priority, all resulting backup files are more or less the same size when done ~345GB
This sounds very excessive, something in its settings must be wrong here?
I'll get the config files if required, but I can't as yet as it's backing up.
Thanks, Ian
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Hello Ian!
The full backups take more time, please consider to change the plans to incremental, that's advisable.
Please check the following KB so you can troubleshoot those performance issues: https://kb.acronis.com/content/46770
Please also check if the OS is overloaded while you execute the backups, if this is happening it's normal that takes more time to be executed. ( consider also to change the schedule time ).
Run the CHKDSK and try to check if there are any errors in the disks.
If you have the validation active or the sector by sector backup it's expected they will take more time also.
Let us know if that solved the issue!
Thanks.
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