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Physical to Azure Conversion Slowness

Posted: Fri Jan 09, 2026 1:53 am
by shirasu
Hello! I'm currently converting a VM, It took 24 hours for a 240GB drive to transfer to the storage. I now have a 2TB Drive that hasn't even moved the needle.

When I check network performance in task manager it shows that Starwind V2V Converter is only using 21.9 Mbps. We're on a 1G symmetrical network which all speed tests are confirming. Upload tests to azure also show great speeds. Any suggestions on how to rectify this? At this rate its going to take a week to finish.

Re: Physical to Azure Conversion Slowness

Posted: Fri Jan 09, 2026 8:16 am
by yaroslav (staff)
Welcome to StarWind Forum.
The slowness can be coming from the underlying storage performance and the fact that V2V is single-threaded.
Check the underlying storage performance under large blocks; if it is good, sadly, that's more of an issue for the design of an app (we are looking towards optimizing it).

Re: Physical to Azure Conversion Slowness

Posted: Fri Jan 09, 2026 10:37 pm
by shirasu
Hey Yaroslav, I'm doing P2V from Physical to Azure, Storage doesnt seem to be getting hit hard at all.

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Re: Physical to Azure Conversion Slowness

Posted: Sat Jan 10, 2026 4:50 am
by yaroslav (staff)
I will log the internal request to see if we can improve the performance.
This will be a long process.