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.
By far the easiest way to get to Siena from Florence (though the train journey is much more picturesque). Take the SITA bus (located in a small underground bus depot across the street, to the west of Santa Maria Novella train station).