Podcast
Questions and Answers
What type of optical disc can be written to but not erased?
What type of optical disc can be written to but not erased?
Which optical disc format has the highest storage capacity?
Which optical disc format has the highest storage capacity?
What is the primary function of a tape drive?
What is the primary function of a tape drive?
Which of the following is a characteristic of a DVD-ROM?
Which of the following is a characteristic of a DVD-ROM?
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Which type of card contains a magnetic stripe that stores information?
Which type of card contains a magnetic stripe that stores information?
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What differentiates a CD-RW from a CD-R?
What differentiates a CD-RW from a CD-R?
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Which of the following does NOT describe a Picture CD?
Which of the following does NOT describe a Picture CD?
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What type of storage medium uses microscopic images on film?
What type of storage medium uses microscopic images on film?
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What describes the function of external hard disks?
What describes the function of external hard disks?
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What is the typical purpose of enterprise storage?
What is the typical purpose of enterprise storage?
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What is unique about a smart card?
What is unique about a smart card?
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Which optical format is erasable and supports multiple sessions?
Which optical format is erasable and supports multiple sessions?
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What technology is used for digital data storage using magnetic tape?
What technology is used for digital data storage using magnetic tape?
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Which optical disc cannot be written to after data is initially written?
Which optical disc cannot be written to after data is initially written?
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What does access time measure in storage devices?
What does access time measure in storage devices?
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Which of the following characterizes a hard disk's structure?
Which of the following characterizes a hard disk's structure?
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Which type of storage does a USB flash drive fall under?
Which type of storage does a USB flash drive fall under?
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What is the main advantage of cloud storage?
What is the main advantage of cloud storage?
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Which of the following is NOT a characteristic of solid state drives (SSDs)?
Which of the following is NOT a characteristic of solid state drives (SSDs)?
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What defines the formatting of a hard disk?
What defines the formatting of a hard disk?
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Which of the following storage types is known for having removable media?
Which of the following storage types is known for having removable media?
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What happens during a head crash in a hard disk?
What happens during a head crash in a hard disk?
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What components are part of a disk controller?
What components are part of a disk controller?
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Which characteristic pertains specifically to optical discs?
Which characteristic pertains specifically to optical discs?
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In RAID configuration, what advantage is provided?
In RAID configuration, what advantage is provided?
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What does capacity refer to in the context of storage media?
What does capacity refer to in the context of storage media?
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Which type of flash storage card can store more data than standard SD cards?
Which type of flash storage card can store more data than standard SD cards?
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Study Notes
Storage Devices and Media
- Storage holds data, instructions, and information for future use
- Storage media is the physical material where data is kept
- A storage device is the hardware that records and retrieves items from storage media
- Reading transfers data from storage media to memory
- Writing transfers data from memory to storage media
- Access time is the time it takes to find and retrieve stored data.
Hard Disks
- Hard disks use inflexible, circular platters with magnetic particles to store data
- Hard disks can use longitudinal or perpendicular recording methods.
- Hard disk characteristics include capacity, platters, read/write heads, cylinders, sectors, tracks, revolutions per minute, transfer rate, and access time.
- Formatting divides the disk into tracks and sectors for the operating system.
- A hard disk's performance is influenced by the number of platters and access time.
- A head crash occurs when a read/write head touches the surface of a platter.
- A controller chip on a hard drive is called a disk controller.
- Includes RAID, which integrates multiple hard drives, and NAS devices, which are network-connected servers.
- External hard drives are separate from the computer.
- Removable hard drives can be inserted and removed from a drive.
Flash Memory Storage
- Flash memory chips are a type of solid state media.
- Solid state drives (SSDs) do not have moving parts. Advantages include faster access time, faster transfer rates, less heat generation, and longer lifespan.
- Memory cards are removable and used in computers, mobile devices, and card readers.
- USB flash drives plug into a USB port.
- ExpressCard modules are removable and used in notebooks.
Optical Discs
- Optical discs are flat, round, portable, and made of metal, plastic, and lacquer.
- Optical discs are read by lasers.
- They store software, data, digital photos, movies, and music.
- Optical discs can be read-only or rewritable.
- Archive discs store digital images from online photo centers and have resolutions usually 7200 pixels per photo.
- Cost is determined by the number of photos being stored.
- Picture CDs are single-session CD-ROMs, storing digital versions of film in 1024x1536 resolution.
- Formatting is involved for data.
- Care is important for optical discs, avoiding exposing them to heat or sunlight, etc.
- Common types include CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RW, DVD+RW, DVD+RAM, and Blu-ray Disc-ROM (BD-ROM).
Cloud Storage
- Cloud storage is an internet service.
- Users subscribe to cloud storage for various reasons (access to files, storing or accessing large files quickly, viewing time-sensitive files, creating off-site backups, and data center functions.)
- Cloud storage providers vary, some include Dropbox, Google Drive, and Microsoft OneDrive.
Other Storage Types
- Tape is a magnetically coated ribbon that stores data and information.
- A tape drive reads and writes data onto tape.
- Magnetic stripe cards are used for storing information.
- Smart cards store data using a microprocessor embedded within the card.
- Microfilm and microfiche store microscopic images of documents.
- Enterprise storage stores large volumes of data for businesses and often uses special hardware setups for reliability and high performance.
Media Life Expectancy
- Different media have varying life expectancy (e.g., magnetic disks: 3-5 years, optical discs; 5-10 years, solid state drives: 50 years, Microfilm: 100 years, etc.). These vary according to quality and manufacturer.
Putting It All Together
- Different users have different storage needs. This section details differences for home users, small office/home office users, power users, and enterprise users.
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Description
Test your knowledge on storage devices and media with this quiz. Explore the functions of different storage types, the characteristics of hard disks, and the processes of reading and writing data. Perfect for students learning about computer hardware and data management.
