File converter read error

VM image converter (VMDK, VHD, VHDX, IMG, RAW, QCOW and QCOW2), P2V migrator
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jerryk1234
Posts: 2
Joined: Fri Oct 17, 2025 1:22 am

Fri Oct 17, 2025 1:40 am

Hello!

Trying out the V2V converter. I am converting the C: on a Windows box to a Virtual Box image to run under Linux. So far so good. It's about 500GB of stuff. The conversion dies somewhere - it says there's a read failure. But it does not say what file ( or what sector ) it failed to read. How to troubleshoot? The destination file is on a new/empty 1-tb SATA SSD.

Chkdsk finds no problems in the source drive.

Does V2V Converter keep a log file?
yaroslav (staff)
Staff
Posts: 4309
Joined: Mon Nov 18, 2019 11:11 am

Fri Oct 17, 2025 7:56 am

Welcome to StarWind Forum!
Can you please try something like Disk2VHD and see if the conversion completes?
jerryk1234
Posts: 2
Joined: Fri Oct 17, 2025 1:22 am

Fri Oct 17, 2025 2:23 pm

Tried disk2vhd first. No joy. It terminated with an error. Trying disk2vhd again. Started it yesterday, it is still running today. I'm pretty sure it's stuck. Source drive is a Samsung NVME SSD, and dest drive is a Samsung SATA SSD. Motherboard is a 2020-vintage XEON with 64G of ECC RAM. Should reasonably do the whole job in an hour or so.

According to Task Manager, disk2vhd is using between 0 to 0.9% of the CPU, 159.0MB of memory. The destination file exists, but it is zero bytes long.

An earlier run did produce a large output file. But it terminated with some sort of undefined read error.

Do these tools copy files? Or do they do a nybble copy, sector by sector?
yaroslav (staff)
Staff
Posts: 4309
Joined: Mon Nov 18, 2019 11:11 am

Fri Oct 17, 2025 3:06 pm

It looks like there's indeed something with that disk.
StarWind V2V copies sector by sector. What I am thinking is using something like Macrium Reflect to reflect to VHDX that you create and attach to your host. Could help.
V2V can be used afterward, once you have a VHD with data there.
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