I do not think there is any warning output with the zero-span recorder. The I/Q recording utility will show the warning (see picture)
Yes that is by design that the utility doesn’t provide an XML, I wanted to move towards a standardized format such as SigMF, but haven’t done so yet. The utility satisfied a number of customers that just wanted long term recording to multiple files and didn’t need the context file at the time.
The utility recorder is optimized for long term recordings and I think will ultimately be better for your use case. It can save to multiple files without gaps between the multiple files. The zero-span recording does not guarantee no-gaps between the files if you choose to output to multiple files (hopefully that’s not your issue). This allows you to load a sequence of files in the VSG60 “streaming” mode and be fully continuous.
I just did some testing here. My SSD claims 550MB/s sustained writes, but using your settings, will only sustain the 400MB/s (required for 100MS/s rate) for ~1 second before dropping to a lower rate of 250MB/s and thus eventually needing to drop data.
I did record the 1 second file at 100MS/s and played back at 50, and everything seemed fine as long as I halved the measurement rate.
