Acronis Cyber Protect Home Office Build 40729_Error 0x4000C "error writing on sector 0 disk 1. File is read-only"
I have had a similar problem since build 40729 was released and automatically updated in my laptop.
Creating a virtual disk (.vhdx) from an image (.tib) has been impossible.
I get error 0x4000C and the message "error writing on sector '0' at disk '1'. File is read only".
Tried several solutions (chkdsk, changing readonly config at cmd/diskpart) and sending System Report & Screen Shots to Acronis. Been with this issue for a month and a half already.
Last night I found a workaround, though not a solution:
- I downloaded ATI 2021 (30-day trial) to a different laptop.
- made the backup (from existing .tib file)
- created the virtual disk (.vhdx) from the backup.
- The process ran swiftly. The virtual disk was created correctly, no problems.
Something must be wrong with ACPHO build 40729.
Attachment | Size |
---|---|
Acronis_Error_VHD.pdf | 337.93 KB |


- Log in to post comments

Hello Francisco,
I have updated the ticket raised by yourself.
You can expect a contact from our support as soon as possible.
Best regards.
- Log in to post comments

I also can confirm that conversion to VHD of a backup file stored on an NAS device fails in the same manner as described by the others here. What is produced is a 5 MB vhdx file which I suspect is the marker file for the vhd.
- Log in to post comments