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Exam 6: External Memory

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Question 1

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Scanning information at the same rate by rotating the disk at a fixed speed is known as the _________.

A) constant angular velocity
B) magnetoresistive
C) rotational delay
D) constant linear velocity

E) A) and B)
F) A) and C)

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Question 2

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The _________ disk is a small,flexible platter and the least expensive type of disk.

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Question 3

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A __________ disk is permanently mounted in the disk drive,such as the hard disk in a personal computer.

RAID level ________ has the highest disk overhead of all RAID types.

A _________ is a high-definition video disk that can store 25 Gbytes on a single layer on a single side.

The disadvantage of _________ is that the amount of data that can be stored on the long outer tracks is only the same as what can be stored on the short inner tracks.

Because data are striped in very small strips,RAID 3 cannot achieve very high data transfer rates.

Data are recorded on and later retrieved from the disk via a conducting coil named the _________.

A _________ drive is a memory device made with solid-state components that can be used as a replacement to a hard disk drive.

In most contemporary systems fixed-length sectors are used,with _________ bytes being the nearly universal sector size.

There are typically hundreds of sectors per track and they may be either fixed or variable lengths.

__________ is the standardized scheme for multiple-disk database design.

Magnetic disks are the foundation of external memory on virtually all computer systems.

Data is organized on the platter in a concentric set of rings called ________.

RAID levels 4 through 6 make use of an __________ access technique that allows separate I / O requests to be satisfied in parallel.

SSD performance has a tendency to speed up as the device is used.

Adjacent tracks are separated by _________.

A removable disk can be removed and replaced with another disk.

The set of all the tracks in the same relative position on the platter is referred to as a _________.

A bit near the center of a rotating disk travels past a fixed point slower than a bit on the outside.