Because of ensuring that results are exactly the same from run to run, norandomness flag is used with recon-all. 

To better understand the randomness, we have a few questions listed below. 

1. Which algorithms inside the recon-all use the seeded random number? 

And what randomness is about?

2. Is there a way to use a seed value to ensure the same data can be reproduced?

3. Whether we are compromising anything by going with the non-random option?

Thank you very much for your time and looking forward to hearing from you.

Best regards

Xin