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Question

When a disk stack is serviced by a comb-like access mechanism, there is one read/write head for each __________.

A
Disk
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B
Disk surface
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C
Track
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D
Cylinder
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E
None of the above
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Solution

The correct option is B Disk surface

When a disk stack is serviced by a comb-like access mechanism, there is one read/write head for each Disk surface.

A surface test tool does what it implies - it scans the hard disk surface, check bad sectors and mark bad sectors so that the computer knows they will be not used in the future. ... It can identify bad sectors by reviewing the hard drive.

Disk read/write heads are the small parts of a disk drive which move above the disk platter and transform the platter's magnetic field into electrical current (read the disk) or, vice versa, transform electrical current into magnetic field (write the disk).[1] The heads have gone through a number of changes over the years.

A hard disk drive platter (or disk) is the circular disk on which magnetic data is stored in a hard disk drive. The rigid nature of the platters in a hard drive is what gives them their name (as opposed to the flexible materials which are used to make floppy disks). Hard drives typically have several platters which are mounted on the same spindle. A platter can store information on both sides, requiring two heads per platter.


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