Skip to main content

Acronis Cyber Protect Home Office Build 40729_Error 0x4000C "error writing on sector 0 disk 1. File is read-only"

Thread needs solution

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
0 Users found this helpful

Francisco, I can confirm that I am able to recreate the same issue for ACPHO #40729 when trying to convert a disk image (.tibx) to a VHDX file.

If Ignore is clicked, it comes back with multiple different 'failed to write to sector...' addresses, and clicking on 'Ignore all' then gives the error 'Unable to convert the backup to Windows format' as shown above.

Doing the same action on ATI 2021 works fine!

The Ti_Demon log for ACPHO shows the errors in the next images.

I would recommend opening a Support case direct with Acronis for this issue and making reference to this forum topic.

frestogaslorastaswastavewroviwroclolacorashibushurutraciwrubrishabenichikucrijorejenufrilomuwrigaslowrikejawrachosleratiswurelaseriprouobrunoviswosuthitribrepakotritopislivadrauibretisetewrapenuwrapi
Posts: 2
Comments: 1727

Hello Francisco,

I have updated the ticket raised by yourself.

You can expect a contact from our support as soon as possible.

Best regards.

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.