In an announcement that means that the world will now have to take erasable optical disk drives seriously, Maxtor Corp, San Jose, California yesterday introduced a family of drives that it said offers the highest capacity and performance available. In development for two years, the new line includes the 1Gb formatted 5.25 Tahiti I with a seek time of 30mS, and 160Mb 3.5 Fiji I with a 100mS average seek time. Both the drives use removable media and the SCS Interface. Volume deliveries of both drives are promised in September. Maxtor says it has increased the available capacity by a technique called zone formatting, which divides a disk into zones of equal recording density.