Windows Backup Shadow Copy Space Required?

Question

Hello.

I have a issue with in windows backup services, specifically shadow copy.

I want to create bare metal recovery image, my server is running Windows 2012R2, this server C: drive has 1.8TB size available 175GB.
Went I setup the bare metal and run the task, in seconds I receive a error from "Shadow Copy" saying that there is not enough space available to finish the task.
Them, how many space to "Shadow Copy" need?

Any help will me appreciated, thanks!!!