Travelstar z5k500 is the 5400 rpm 25 inch hard drive from hitachi with high capacity and the advanced format drive advanced format increases the physical sector size on hdds from 512 bytes to 4 096 bytes which improves drive capacities and error correction capabilities the z5k500 carries the ecotrac classification due to its low power consumption and eco friendly halogen free production travelstar z5k500 delivers the right balance of capacity power management and design flexibility to m