Hello Alex and thank you for the explanations, I forgot but of course the test is running on same hardware and same full caches (2 sata drives 15k rpm 123 Gb of caches each) I will return to diskd now, because the point 2 is annoying for me, but rock seems very promising for me _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users