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Storage Device

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Fareen Aron

on 8 February 2015

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Transcript of Storage Device

Storage Device
Group A
BIK1103 English for ICT
i. Noor Fareen binti Aron (E20141009353)
Types of Storage Device;
1. Removable storage
2. Non-removable
Functions of Storage Device
What is Storage Device?
Hardware that is used in computer to;
Record data
Restore data
Prepared by
ii. Ahmad Asyraf bin Abdul Rahman (E2014100962)
iii. Melanie Masha Anak Banyang (E20141009358)
iv. Mohd. Syawal Firdaus bin Hamdan (E20141009365)
v. Rayevangelina Ralenani Suntik Anak Rapu (E20141009350)
vi. Dayangku Shahrizan binti Awang Kok Omar (E20141009364)
Purpose of Storage Device

-To hold data even when the computer is turned off
-The data can be used whenever needed
3 types of memories
1. Primary Memory
2. Secondary Memory
3. Cloud Storage
1. Primary Memory
Other term-main storage
Easier and faster to access due to the immediacy of the storage
Examples: 1. Random Access Memory (RAM)
2. Read Only Memory (ROM)
3. Programmable Read Only Memory (PROM)
4. Built-in Devices: Processor's L1 Cache
TYPES OF CLOUD STORAGE
1. Personal cloud storage
Known as mobile cloud storage
Is a subset of public cloud storage that applies to storing an individual data in the cloud and providing the individual with access to the data from anywhere.
Also provides data syncing and sharing capabilities acoss multiple devices.
Examples : Apple's icloud, Amazon Cloud Drive , Box , Dropbox , Google Drive , Mediafire , Mega , MIcrosoft Sky Dive , SpiderOak , Ubuntu One.
Apple's icloud storage
Amazon cloud drive
Dropbox
Google Drive
2. PUBLIC CLOUD STORAGE
Where the interprise and storage service provider are separate and there ren't any cloud resources stored in the enterprise's data center.
Provide fully manages the interprise's public cloud storage
Examples : Amazon Web Services and IBM
Amazon Web Services
IBM Cloud
3. Private Cloud Storage
A form of storage where the interprise and cloud storage provider intergrated in the enterprise's data center.
Storage provider has infrastructure in the interprise's data center that is typically managed by the storage provider.
Help resolve the potential for security and performances concern while still offering the advandtages of cloud storage
4. Hybrid Cloud Storage
Is a combination of public and private clous storage where some critical data resides in the interprise's private cloud while other data is stored and accessible from a public cloud storage.
Examples : ATMOS product and Solidfire
ATMOS
REFERENCES
1. webopedia.(no date).
cloud storage
. Retrieved from http://www.webopedia.com/TERM/C/cloud_storage.html
2. zdnet.(2013).
The top 10 personal cloud -storage services.
Retrieved from http://www.zdnet.com/article/the-top-10-personal-cloud-storage-services/
3. Apple.(no date).
iCloud
.Retrieved from http://www.apple.com/uk/support/icloud/
REFERENCES
4. amazon.(no date).
Amazon cloud drive
. Retrieved from https://www.amazon.co.uk/clouddrive/home/?_encoding=UTF8&*Version*=1&*entries*=0
5. dropbox.(no date).
dropbox
. Retrieved from https://www.dropbox.com/
6. amazon(no date).
Amazon Web Service(AWS)
. Retrieved from http://aws.amazon.com/

REFERENCES
7. IBM (no date).
IBM Cloud Computing
. Retrieved from http://www.ibm.com/cloud-computing/uk/en/

Examples of Storage Devices
Random Access Memory (RAM)
Floppy Disc
USB Flash Drive
Memory Cards
Read Only Memory (ROM)
DVDs
CDs
Random Access Memory (RAM)
used for storing information temporarily
access rate of RAM is much higher
more expensive than the other types of primary storage devices

Floppy Disc
a magnetic storage device, which is set in square plastic shell
available in different sizes; 8 inches, 5 ¼ inches and 3 ½ inches

USB Flash Drive
consist of NANO type flash memory
has an integrated Universal Serial Bus (USB) interface
non-volatile and data can be rewritten on them
Memory Card
data is stored in digital format on the memory cards
can be used in various electronic devices from hand held computers, mobile phones, cameras, etc.
rewritable
Read Only Memory (ROM)
used to permanently store data; the data stored on ROM cannot be changed
access rate necessary to get to the memory is much lesser as compared to the access rate of the RAM
DVDs
there are many different competing standards for creating DVD discs; DVD-R, DVD-RW, DVD+R, DVD+RW, DVD+R DL (DVD+R9), and DVD-RAM
DVD-R (Digital Versatile Disc-Recordable) is similar to the idea behind CD-R
DVD-R is capable or recording once to a disc and then read many times after it has been created
compatible with most stand alone DVD players and computer DVD-ROM drives.
CDs
there are three types of CDs; CD-R (Recordable), CD-WO (Write Only) and CD-WORM (Write Once Read Many)
CD-R is a writable disc; information can be written once and then can be read many times
CD-R can hold up to 650 MB (74 minutes of music) or 700MB (80 minutes of music)
References

Merry Jane T. Pantalia. (no date).
5 examples of storage devices
. Retrieved from http://dongyoo.blogspot.com/2010/12/assignment.html
Unknown. (no date).
Storage device
. Retrieved from http://www.computerhope.com/jargon/s/stordevi.htm
1. Primary storage
Hold pieces of program instructions and data.
Hold intermediate results of processing and recently produced results from currently working computer.
2. Secondary Storage
Take care of the limitations of primary storage.
Retain information when the computer is switched off.
Store programs and data for future use.
Store information permanently.
Back up data and programs.
4. Magnetic Medium
Non-volatile storage medium.
Use magnetic particles to store data instructions and information in disk's surface.
example for magnetic disk: Floppy disk, hard disk, zip disk
example for magnetic tape: video cassette, tape
3. Cloud Storage
To storage data online in the 'cloud'.
5. Optical medium
Hold content in digital form that are written and read by laser.
Used for distribution of digital information.
(CD, CD-ROM, DVD)
Store data which cannot be erased or written over once saved.
(CD-R)
Allows data which has been saved to be erased and rewritten.
(CD-RW, DVD-RW, DVD-RAM)

6. Flash Memory
Store bits of information data in memory cells like DRAM
(Dynamic RAM)
Works like hard-drive data
(remain the memory even when the power is switched off)
Reference
1. e-How. (2014).
The function of secondary storage
. Retrieved from
http://www.ehow.com/info_8591937_function-secondary-storage.html

2. Computer System. (no date).
What are the function of secondary storage
. Retrieved from
http://www.answers.com/Q/What_are_the_functions_of_primary_storage_device

3. AnswersTM. (no date).
What are the differences between primary

and secondary storage device?
. Retrieved from
http://www.answers.com/Q/What_are_the_difference_between_primary_and_secondary_storage_device

4. AnswersTM. (no date).
What are the differences between primary and secondary storage device?.
Retrieved from
http://www.answers.com/Q/What_are_the_difference_between_primary_and_secondary_storage_device

5.AnswersTM. (no date).
What is the main function of the secondary storage?
Retrieved from
http://www.answers.com/Q/What_is_the_main_function_of_the_secondary_storage

6.Alfa0910. (2009).
Explain types and funtions primary and secondary storage
. Retrieved from
http://alfa0910.blogspot.com/2009/07/2241-explain-types-and-functions.html


Possible Threat to Storage Devices
The uncontrolled use of portable storage by the corporate insiders

Portable storage are small and concealable
Difficult to ensure that no one has brought a banned device

The inability to discriminate between legimate devices

Devices should denied access to resources

Easily affected by viruses
Disadvantages of Storage Devices
Expensive to purchase
Remember to back up files

Flash drive or USB
Limited storage
Easy to lose
Easily affected by viruses
Mp3
must connect to computer using a cable
CD
Cannot be over written
Must have CD-RW
DVD
Do not work in CD rom drives
Diskette (floppy disk)
Old
Only store small files
SD cards
Easy to lose
Not all computers have SD reader
Cloud
Need internet connection
References
1. Canadian Parliament.(2000).
Personal information and Electronic Documents.
Retrieved from http://www.privcom.gc.ca/legislation/

2.Computer Crime Research Center.(2005).
Security issues
. Retrieved from http://www.crime-research.org?analytics/security-insider
SECONDARY STORAGE
-devices that require input and output devices
-hold lots of data based on the capacity

STORAGE DEVICE HIERARCHY
-range of memory and storage inside the computer
-it is categorised into 3 :
=primary sorage
=secondary storage
=cloud storage
-going down the hierarchy, there is reduction in cost and and performance but increase in capacity
Exercises
DVD/CD
Tape
Floppy disk
Smart Media
Memory Stick
Flash Drive
Acronym Tests
ROM =
RAM=
CD ROM =
CD R=
CD RW=
DVD =
Full transcript