Briefly describe 'magnetic disk' with schematic diagrams (do not copy/paste). You description should address the following: shape, read/write head, cylinder, track, sector, data bits, preamble bits, ECC bits, inter-sector gap. How long does it take read a disk with 10,000 cylinders, each containing 8 tracks of 1024 sectors? First, all the sectors of track 0 are to be read starting at sector 0, then all the sectors of track 1 starting at sector 0, and so on. The rotation time is 15 msec, and a seek takes 3 msec between adjacent cylinders and 30 msec for the worst case. Switching between tracks of cylinder can be done instantaneously