A distinction is madebetween physical records and logical records. A logical rec

Question

A distinction is madebetween physical records and logical records. A logical record is acollection of related data elements treated as a conceptual unit,independent of how or where the information is stored. A physicalrecord is contiguous area of storage space that is defined by thecharacteristics of the storage device and operating system. Assumea disk system in which each physical record contains thirty120-byte logical records. Calculate how much disk space (insectors, tracks, and surfaces) will be required to store 300,000logical records if the disk is fixed-sector with 512 bytes/sector,with 96 sectors/track, 110 tracks per surface, and 8 usablesurfaces. Ignore any file header record(s) and track indexes, andassume that records cannot span two sectors.

Explanation / Answer

Dear User,               Given data:                       The physical record size in disk system = thiry 120-byte logicalrecords                        The number of logical records = 3,00,000                         Thenumber of bytes per sector = 512bytes                        The number of sectors per track = 96 sectors                        The number of tracks per surface = 110 tracks                        The number of usable surfaces = 8                        Each sector can hold 4 logical records.                        The required number of sectors = 300,000/4                                                                         =75000 sectors                        The required number of tracks = 75000/96                                                                        =782tracks                        The required number of surfaces = 782/110                                                                          =8surfaces I hope this will helps to you                                          

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