How to disable module in initrd

[Gianluca Cecchi]

On Tue Nov 19 15:13:24 UTC 2013 Tom Horsley wrote:
> I'm pretty sure the initrd files are really just gzip compressed
> cpio archives, so you could uncompress it, extract the files, and
> do anything you want to them, then rebuild it (probably a good
> idea to keep the original in case everything goes wrong :-).

I see it.
But before dracut days I was able to:
1. extract the archive
2. remove module.ko file from /lib
3. remove from init file the line "insmod module.ko"
4. re-create archive

Now the "init" file inside initrd seems to be systemd and so I'm not
sure if only removing qla2xxx.ko is ok or not.