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Hard Disk Drives: Head Crash and Disk Cache

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Questions and Answers

What is the primary advantage of RAID 1 (Mirroring)?

No need to rebuild data if a drive fails (correct)
Improved data transfer speeds
Doubles the effective storage capacity
Hot swapping capability for failed drives

Which RAID level combines the features of both RAID 1 and RAID 0?

RAID 2
RAID 10 (correct)
RAID 5
RAID 6

Why does RAID 1 have an effective storage capacity that is only half of the total drive capacity?

Data are stored twice to provide fault tolerance (correct)
It requires triple data redundancy
It uses a mix of SSD and HDD drives
Software RAID 1 solutions do not allow data compression

Which RAID level is known for its excellent read speed and write-speed, comparable to that of a single drive?

RAID 1 (C) Signup and view all the answers

In the context of RAID 1 solutions, what is a common disadvantage of software RAID implementations?

Not supporting hot swapping of failed drives (A) Signup and view all the answers

Which feature distinguishes RAID 10 from other RAID types in terms of data storage?

Striping for improved transfer speeds (A) Signup and view all the answers

What is the main advantage of a RAID 10 configuration?

The rebuild time in case of a disk failure is very fast due to mirroring. (D) Signup and view all the answers

Which of the following is NOT a benefit of flash memory storage?

Flash memory is the most cost-effective storage solution. (A) Signup and view all the answers

What is the main disadvantage of using an external hard drive for storage?

External hard drives have moving parts which can lead to mechanical failure. (B) Signup and view all the answers

What is the primary difference between storage and memory in a computer system?

Memory is used for temporary data, while storage is used for long-term data. (B) Signup and view all the answers

What is a Network Attached Storage (NAS) device used for?

A NAS device is used for providing additional storage capacity to a computer network. (A) Signup and view all the answers

What is the main difference between storage and memory?

Memory is volatile, while storage is non-volatile (D) Signup and view all the answers

What is a network attached storage (NAS) device?

A device that is used to store data in a network (D) Signup and view all the answers

What is the capacity of a hard disk drive?

1 terabyte (B) Signup and view all the answers

What is the access time of a hard disk drive?

1 millisecond (B) Signup and view all the answers

What is RAID 0?

A RAID level that uses multiple drives for data storage (B) Signup and view all the answers

What is a disk cache?

A memory chip on a hard disk that stores frequently accessed data (A) Signup and view all the answers

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