Most disk drives have a single read/write head for each disk surface. What is the advantage of using multiple heads on each removable access arm?
Most disk drives have a single read/write head for each disk surface. What is the advantage of using multiple heads on each removable access arm?
The correct option is C Reduced seek time
Most disk drives have a single read/write head for each
disk surface. Reduced seek time is the advantage of suing multiple heads on
each movable access arm.
Higher performance in hard disk drives comes from devices
which have better performance characteristics. These devices include those with
rotating media, hereby called rotating drives, i.e., hard disk drives (HDD),
floppy disk drives (FDD), optical discs (DVD-RW / CD-RW), and it also covers
devices without moving parts like solid-state drives (SSD). For SSDs, most of
the attributes related to the movement of mechanical components are not
applicable, but the device is actually affected by some other electrically
based element that still causes a measurable delay when isolating and measuring
that attribute. These performance characteristics can be grouped into two
categories: access time and data transfer time (or rate). Refers
to the time a program or device takes to locate a particular piece of data.
For disk drives, the terms seek time and access time are
often used interchangeably. Technically speaking, however, the access time is
often longer the seek time because it includes a brief latency period.
Most disk drives have a single read/write head for each disk surface. Reduced seek time is the advantage of suing multiple heads on each movable access arm.
Higher performance in hard disk drives comes from devices which have better performance characteristics. These devices include those with rotating media, hereby called rotating drives, i.e., hard disk drives (HDD), floppy disk drives (FDD), optical discs (DVD-RW / CD-RW), and it also covers devices without moving parts like solid-state drives (SSD). For SSDs, most of the attributes related to the movement of mechanical components are not applicable, but the device is actually affected by some other electrically based element that still causes a measurable delay when isolating and measuring that attribute. These performance characteristics can be grouped into two categories: access time and data transfer time (or rate). Refers to the time a program or device takes to locate a particular piece of data.
For disk drives, the terms seek time and access time are often used interchangeably. Technically speaking, however, the access time is often longer the seek time because it includes a brief latency period.
