p3.mag.gz stalled and then fail

[cartal]

Hi

I'm using fermi to assemble a very large animal genome with a single 180-bp Illumina HiSeq library. In this case, with the default parameters FERMI runs smoothly up to the generation of a rather large (7.1 TiB so far) p3.mag.gz file and later it fails probably due to disk space issues.

So my questions are: What is the p3.mag.gz? and how can I optimise this step?

Thank you