My test for filesystems are testing persistence of repository too. For such test
I need to make second start of the ide. It works fine till I try check order of
mounted filesystems in the second ide start. There aren't any from filesystems
mounted during the first run.

Is it possible to disable the unmounting feature of xtest ide execution while
starting ide second time. It can be done using following method:

    private static boolean isFirstStart(){
        String s =
System.getProperty("netbeans.user")+File.separator+"system"+File.separator+"Projects"+File.separator+"Default"+File.separator+"system"+File.separator+"Windows";
        java.io.File f = new java.io.File(s);
        if (f.exists()) return false;
        return true;
    }

Or moreover why are filesystems unmounted after the firstart too.

I propose to disable this historical behaviour: Do not unmount any filesystem
after start of ide (first or second ...). We should test builds how they are
produced not "prepare" ide for testing.