In a RAID 5 array, data is striped and stored onto all but one drive. The last drive stores parity data for that stripe, for redundancy purposes. Which drives are used for data or parity alternates for each stripe.
Siena [1] is a medieval city in the region of Tuscany, located in the north of Italy some 70 km (43 mi) south of Florence. It is probably best known for a colourful horse race, Il Palio, conducted twice each year in the summer.
Siena is located in the central part of Tuscany, in the middle of a vast hilly landscape between the Arbia river valley (south), the Merse valley (south-west), the Elsa valley (north), the Chianti hills (north-east), the Montagnola Senese (west) and the Crete Senesi (south-east).