3. Parity : As explained above, mirroring involves high cost, so to protect the data new technique is used with striping called parity. This is reliable and low cost solution for data protection. In this method and additional HDD or disk is added to the stripe width to hold parity bit.
For mounting bracket used on some firearms, see Picatinny rail. The Picatinny Arsenal (/ËpÉªkÉtÉªni/ or /ËpÉªkÉËtÉªni/) is an American military research and manufacturing facility located on 6,400 acres (26 km2) of land in Jefferson Township and Rockaway Township in Morris County, New Jersey, United States, encompassing Picatinny Lake and Lake Denmark.
In order to provide a stable platform, the rail should not flex as the barrel heats and cools; this is the purpose of the spacing slots: they give the rail considerable room to expand and contract lengthwise without distorting its shape. The Picatinny locking slot width is 0.206 in (5.23mm). The spacing of slot centers is 0.394 in (10.01mm) and the slot depth is 0.118 in (3.00mm).The only differences between the Picatinny rail and the similar Weaver rail are the size of these slots and the fact that they are standardized.