Module 8: Digital Storage Quiz

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Questions and Answers

What are the key differences between Storage Area Network (SAN) and Network Attached Storage (NAS)?

SAN is a dedicated network that provides access to consolidated block level storage, while NAS is a file-level storage system that connects to a network and allows file sharing.

Explain the differences between DVD-R and DVD+R formats.

DVD-R is a write-once format primarily used for data storage and video recording, whereas DVD+R allows for better error management and supports more advanced recording features.

What is a RAID configuration and why is it important for data storage?

RAID configurations combine multiple disk drives into a single unit for redundancy and performance, ensuring data integrity and protection against drive failures.

How does RFID technology work to store and transmit information?

RFID technology uses an antenna and a memory chip to store information, which is transmitted via radio waves when an RFID reader interacts with the RFID tag. Signup and view all the answers

Discuss the advantages of using RFID tags over traditional barcodes in inventory management.

RFID tags can be read without direct line-of-sight and in bulk, allowing for faster inventory checks and reducing human error compared to traditional barcodes. Signup and view all the answers

What is the primary purpose of a Storage Area Network (SAN)?

To provide centralized storage for other attached servers. Signup and view all the answers

How does Network Attached Storage (NAS) differ from traditional file servers?

NAS is dedicated solely to providing storage over a network, while traditional file servers handle multiple tasks alongside storage. Signup and view all the answers

What is a key difference between CD-R and CD-RW optical discs?

CD-R can be written to only once, while CD-RW can be erased and rewritten multiple times. Signup and view all the answers

What is the purpose of RAID level 1 in RAID configurations?

RAID level 1 provides mirroring, creating a backup disk for each drive to improve data reliability. Signup and view all the answers

Explain how DVD-R and DVD+R formats are similar.

Both DVD-R and DVD+R are recordable formats that allow users to write data once but not erase it. Signup and view all the answers

What technology is used to read and write data on a magnetic tape?

A tape drive is used to read and write data on magnetic tape. Signup and view all the answers

What advantages does RAID striping provide over mirroring?

RAID striping improves performance by spreading data across multiple drives, enhancing read and write speeds. Signup and view all the answers

What type of card includes an integrated circuit for data storage?

A smart card includes an integrated circuit for data storage. Signup and view all the answers

What is a key feature of a memory card that prevents it from slipping out of a card reader?

A latch on the side of the memory card. Signup and view all the answers

Explain how data is read from an optical disc.

A laser diode shines light toward the disc, where pits scatter the light back while lands reflect it, sending a digital signal of 1 or 0 to the computer. Signup and view all the answers

What distinguishes cloud storage from portable flash memory storage?

Cloud storage is an Internet service that provides storage accessible from various devices, while portable flash memory involves physical storage devices like USB drives and memory cards. Signup and view all the answers

Describe the structure of an optical disc used for data storage.

An optical disc consists of a flat, round combination of metal, plastic, and lacquer, designed to be read and written by a laser. Signup and view all the answers

What role do registers play in the functioning of flash memory devices?

Registers temporarily store data as needed during the read/write process. Signup and view all the answers

How does USB flash drive storage differ from optical disc storage?

USB flash drives provide solid-state storage with faster access times, while optical discs use laser technology to read and write data on a physical surface. Signup and view all the answers

What data organization method typically used in optical discs helps in efficient data retrieval?

Data is stored in a single spiraling track that extends from the center of the disc to its edge. Signup and view all the answers

In what situation would a RAID configuration be beneficial?

RAID configurations are beneficial for data redundancy and performance improvement in storage solutions. Signup and view all the answers

Study Notes

Module 8: Digital Storage

Digital storage is the physical material a computer uses to retain data, programs, and applications.
Cloud storage keeps information on internet servers, these servers conceal the physical media holding files from the user.
Storage devices record and retrieve data from physical storage media.
Reading and writing are processes of transferring data between a medium and memory.
Memory capacity is measured in bytes, with terms like kilobyte (KB), megabyte (MB), gigabyte (GB) etc (See table 8-1 for details).
A storage device is hardware for recording and retrieving from media.
Volatility refers to if data is erased when power is off; RAM is volatile, storage is nonvolatile.
Hard drives contain platters for magnetic storage.
Formatting divides hard disks into tracks and sectors.
Hard disks vary in capacity based on platters, magnetic coatings, recording type, and density.
Characteristics of hard drives include: tracks, sectors, platters, form factor, read/write heads, and revolutions per minute
Hard disks have read/write heads that read and write info, a motor spins the platters for movement of heads over data.
Head crashes happen when read/write heads touch the platter surface; backups are crucial.
An SSD (solid state drive) has its own processor for managing storage.
SSDs are faster, quieter, more durable and lighter than traditional hard disks.
SSDs use less power, generate less heat, and have longer lifespans than hard disks, and don't require defragmentation.
External hard drives are separate storage devices connected to devices via USB.
RAID is a group of integrated hard drives for redundancy and efficiency.
Memory cards (SDHC, SDXC, miniSD, microSDHC) are removable flash storage for devices. Other types include microSDXC, CF, XD Picture Card, Memory Stick PRO Duo, and M2.
USB flash drives plug into USB ports for data transfer.
Cloud storage is an internet service storing data for computer users.
Optical discs (like CDs and DVDs) are flat portable discs written to and read by lasers.
Optical discs have spirals of data tracks and are divided into sectors.
CD-ROMs can be read, not written to; CD-Rs are one time write; CD-RWs are erasable.
DVD-ROM, DVD-R/DVD+R are WORM (write-once, read-many) formats, DVD-RW, DVD+RW, and DVD+RAM allow multiple writes/erasures.
Enterprise hardware is used for heavy data use and maximum efficiency and availability, and may use RAID for duplicates to improve reliability.
Network Attached Storage (NAS) is a network server dedicated to storage and providing storage to clients on the network.
Storage Area Network (SAN) is a high-speed network delivering storage to other servers.
Tapes are magnetically coated ribbons used for high-capacity storage.

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Description

Test your understanding of digital storage in Module 8. This quiz covers various aspects including cloud storage, memory capacity, and the characteristics of storage devices. Dive into key concepts like volatility and formatting of hard drives to enhance your knowledge.