Secondary Storage

A magnetic disk has 100 cylinders, each with 10 tracks of 10 sectors. If each sector contains 128 bytes, what is the maximum capacity of the disk in kilobytes?

A particular disk unit uses a bit string to record the occupancy or vacancy of its tracks, with 0 denoting vacant and 1 for occupied. A 32-bit segment of this string has hexadecimal value D4FE2003. The percentage of occupied tracks for the corresponding part of the disk, to the nearest percentage is:

SATA is the abbreviation of

Consider a disk pack with 16 surfaces, 128 tracks per surface and 256 sectors per track. 512 bytes of data are stored in a bit serial manner in a sector. The capacity of the disk pack and the number of bits required to specify a particular sector in the disk are respectively:

A hard disk system has the following parameters :
Number of tracks =500
Number of sectors/track =100
Number of bytes /sector =500
Time taken by the head to move from one track to adjacent track =1 ms
Rotation speed =600 rpm.
What is the average time taken for transferring 250 bytes from the disk ?