I want to test some physical links in a setup. The software tooling that I can use to test this require a block device to read/write from/to. The block devices I have available can't saturate the physical link so I can't fully test it.
I know I can setup a virtual block device which is backed by a file. So my idea was to somehow setup a virtual block device to /dev/null but the problem is of course that I can't read from it. Is there a way I could setup a virtual block device that writes to /dev/null but just returns always zero when read?
Thank you for any help!