Acronis cannot assign a drive letter while mounting
I have a disk backup (the new TIBX format) containing 4 partitions (of 1 disk).
Exploring (by double-clicking) is fine. But mounting fails. Acronis True Image complains "Cannot assign a drive letter to a partition from the backup archive."
I've tried the following but no luck: 1. repair install Acronis, 2. reboot Windows, 3 select only one partition to mount.
Environment:
- XPS 9550 1TB SSD
- Windows 10 2004 64-bit
- Acronis True Image 2020 build 25700
Mount options window:
Error Message:
Fichier attaché | Taille |
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2020-07-28_14-05-08.png | 70.91 Ko |
2020-07-28_13-58-00.png | 8.72 Ko |


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Thanks Steve, I haven't tried the beta version yet. Just reverted back to ATI 2019 and made backups (good old TIB) all over again.
Now mounting works in ATI 2019 but takes a significant amount of time (around 10 mins) to finish (2 partitions, 400GB data). Any idea to make the mounting faster?
Thank you.
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Mounting time is going to depend on a number of factors such as the size of the partition, the amount of memory available and free space available as well as the CPU being used.
Note: you could still force ATI 2020 to create Disk backups as .tib files where mount is working if needed. See forum topic: How to create a Disk backup as .tib (not .tibx) which will create a new backup task using the older .tib format in the Windows ATI 2020 GUI. I don't know if this would make any difference to the speed at which partitions from .tib files are mounted.
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