MG306: Chapter 7 Hard Drives

How much data does a blue-ray hold

25-128GB

How much data does a DVD hold

4.7-17 GB

How much data does a CD hold

650MB-1GB

Flash Memory Cards are used with

A variety of specialized input devices including digital cameras to store and transfer images and digital media players like the iPod to store and transfer music and video files.

Media

Actual physical material that retains data and programs

What is the role for Solid State Drives (SSDs)

As more people use tablets and laptops, they will become more popular. They are small, reliable, fast, and more energy efficient than standard hard drives

3 kinds of optical disk

CD, DVD and Blue-Ray (BD)

What are the different types of CDs

CD-Rom (you can put data on only once) CD-RW (you can add to the CD later)

Tracks

Concentric rings on the platter

Example of a read-only

DS with music on them bought from a store.

3 Ways to improve the performance of hard disks

Disk catching, Redundant arrays of inexpensive disks (RAID), and file compression/decompression

What kind of drive should you use as a back up drive

External drive

Mass Storage devices that support enterprise storage system

File Server, NAS, RAID systems, and organizational cloud storage

CD

First in optical disk. Typical storage of 700 MB. Often used to store music

4 Widely Used Storage Media

Hard Disk, Solid State, Optical Disk, & Cloud Storage

Secondary Storage Devices

Hard disk, floppy disks, CD, DVD, jump drives

Platter

Hard disks use rigid metallic _______ that provide a large amount of capacity. They store data and programs by altering the electromagnetic charges on the platter's surface

Storage Devices

Hardware that read and writes to storage media

Example of Write Once

Home family movies

Capacity

How much a particular storage medium can hold

Two Types of Hard Disks

Internal and External

Who uses RAID?

Internet Servers and Large Organizations

Cloud Storage

Internet service that provides storage, processing and memory to computer users. Google Drive

RAID Systems

Larger versions of the specialized devices discussed earlier in the chapter that enhance organizational security by constantly making backup copies of files moving across the organization's networks

Advantage of Cloud Storage

Maintenance, fewer hardware upgrades, and easy file sharing and collaboration

Higg Facility Environmental Module

Measures social and labor impacts across the value chain

Head crash

Occurs when the hard disk makes contact with the drive's read-write head. Destroys Data

What is the downside of more drives in your case?

Power requirements and heat generated.

Reading

Process of accessing information

Writing

Process of saving information to a secondary storage device

California Proposition 65

Prohibits california businesses from knowingly discharging significant amounts of listed chemicals into sources of drinking water. Also known as the Safe Drinking Water and Toxic Enforcement Act of 1986

External Hard Drives are useful to

Protect or secure sensitive information. Used to back up content of internal hard disk and they provide additional hard disk capacity

Disk Catching

Provides a temporary high-speed holding area between a secondary storage device and the CPU; improves performance by anticipating data needs and reducing time to access data from secondary-storage.

Secondary Storage

Provides permanent or nonvolatile storage. Retains data and information after the computer system is turned off

Which is better. 5400 rpms or 7200 rpm

RPM is he speed of rotation of your hard drive. Fast speed means faster data transfer between the disk and the motherboard

RAM

Random Access Memory: Primary Storage. Volatile, meaning that it loses its content whenever power is disrupted

3 basic formats of optical discs

Read only, write once, and rewritable

External Hard Drives

Removable. Provide Slower access and typically connect to a USB or thunderbolt on the system unit.

SSDs (Solid State Drives)

Similar to internal hard-disk drives except they use solid-state memory; faster, more durable, more expensive, and generally provide less capacity. Hybrid systems contain SSD and magnetic disks

Disadvantage of Cloud Storage

Slower access speed and less control over file security

Solid- State Storage is

Slower than traditional memory but much faster than traditional hard disk

DVD

Standard optical discs. Typical storage 4.7GB. Ofter used to store movies and software

SANs

Storage area network; method of using enterprise-level remote storage system as if they were local to your computer.

Solid-State Storage

Storage, such as flash memory, has no moving parts. Offers a combo of features of RAM and ROM. Can be updates like RAM and will not loose info when a computer is shit down like ROM

Example of rewritable

Storing and sharing audio and video files

SSDs are used in

Tablets, smartphones ,and other mobile devices

Optical Disk

Use later technology instead of magnetic charges. Uses tracks and sector stop organize and store files. 1s and 0s are presented by pits and lands

Sectors

Wedge-shaped sections

Why do we still use magnetic tape storage for large data installations

When the power goes off, tapes do not loose their data. They are compatible across hardware manufacturers. They are easy to transport because they don't need to stay energized

WRAP

Worldwide Responsible Accredited Production; Non for profit organization dedicated to promoting safe, lawful, humane, and ethical manufacturing around the world through certification and education

Can you place more than one drive in a mini tower or tower pc?

Yes.The cable that comes with the pc can usually accommodate at least 2

Network Attached Storage (NAS)

a type of filer server designed for homes and small businesses. Less expensive, easier to set up, and easier to manage than most file servers. It does not include powerful management tolls and features found in many large-scale file servers

Sustainable Apparel Coalition

apparel, footwear and home textile industry's that produce no unnecessary environmental harm and has a positive impact on the people and the communities associated with its activities

File Server

dedicated computer with very large storage capacities that provide users access to fast storage and retrieval of data

Rewritable (-RW or -RAM)

discs are similar to write-once discs except that the disc surface is not permanently altered when data is recorded

Write-Once (-R)

discs can be written on once. After that, they can be read many times but can not be written on or erased

Read-Only (-ROM)

discs cannot be written on or erased by the user

File Compression & Decompression

files are compressed before storing and then decompressed before being used again; improves performance through efficient storage

Organizational cloud storage

high-speed internet connection to a dedicated remote storage faciloty. These facilities contain banks of file servers to offer enormous amounts of storage

Key to SANs

high-speed network. This connects individual computers to mass storage devices.

How does File Compression/decompression Work?

increase storage capacity by reducing the amount of space required to store data and programs. Also used to compress DVD, CD, & Flash drives

Internal Hard Disk

located within the system unit. Used to store programs and data files. (Personal computers use this to store operating systems and major apps like word)

BD (blue-ray)

newest form. signed to sore hi def videos. typical storage 50GB.

enterprise storage system

promote efficient and safe use of data across the networks within their organizations

Density

refers to how tightly electromagnetic charges can be packed next to one another on the disk

Mass Storage

refers to the tremendous amount of secondary storage required by large organizations

Cylinders

run through each track of a stack of platters

Hard Disks

save files by altering the magnetic charges of the disk's surface to represent 1s and 0s

RAID (redundant array of inexpensive disks)

several inexpensive hard-disk drives are connected together to improve performance by providing expanded storage, fast access, and high reliability.

Flash Memory Cards

small solid state devices that are widely used with portable devices (laptops, smartphones and GPS systems) Removable

USB Drives (Flash Drives)

so small they fit onto a key ring. Drives connect to a computers USB port and are widely used to transfer data and information between computers, specialty devices and the internet.

Mass Storage Devices

specialized high capacity secondary storage devices designed to meet organizational demands for data storage

Cloud Computing

the internet acts as a "cloud" of servers

Access Speed

time required to retrieve data from a secondary storage device