Abstract: The present invention refers to a digital information adapted memory arrangement, where said arrangement includes hard disc means and one or more writing and/or reading heads, said hard disc means (1) is caused to rotate by using a driving device. Said head or heads (2. 2a) are arranged to a head or heads holding arm (3), causing said head or heads to be oriented adjacent said hard disc means (1) and arranged over (or under) said hard disc means in order to write and/or read digital information to and from said hard disc means. Said head or heads holding arm (3) is fixedly supported by or via base means (B). Said fixed holding arm (3) is arranged to extend over said disc means and that a writing and/or reading head (2, 2a) is allotted to read and/or write information related to a certain radius orientation of information (1a, 1b) related to said disc means, where RAID-technology is used for writing and/or reading data information stored along sections (1a, 1b) of a data track related to said disc (1).