Shopping on line can be easy, simple and save you lots of money. It can also take a lot of your time, frustrate you, and result in unwanted purchases. Now the same can be said for regular high street shopping, but with the vast opportunity presented by the Internet it will pay you to spend a few minutes reading this and understanding how to better optimize your Disk Drives shopping experience:
1. Compare - without doubt the biggest advantage that the Disk Drives offers shoppers today is the ability to compare thousands of Disk Drives at a time. This is a great thing, but not necessarily all the time! Too much can be daunting at times so take advantage of the great comparison sites and where possible let them do the hard work for you.
2. Research - if it has been said it will be on the internet. Ignorance is no longer a justifiable reason for buying the wrong thing. Take the time to research in detail everything that you could possible want to know about
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image:Reel-to-reel recorder tc-630.jpg might be the oldest data storage medium , now replaced by DNA in most organisms.A
data storage device is a device for recording (storing) information (data). Recording can be done using virtually any form of [energy. A storage device may hold information, process information, or both. A device that only holds information is a recording medium. Devices that process information (data storage equipment) may either access a separate portable (removable) recording medium or a permanent component to store and retrieve information.
Electronic data storage is storage which requires electrical power to store and retrieve that data. Most storage devices that do not require visual optics to read data fall into this category. Electronic data may be stored in either an
Analog signal or digital signal format. This type of data is considered to be electronically encoder data, whether or not it is
semiconductor. Most electronic data storage media (including some forms of
computer storage) are considered permanent (non-volatile) storage, that is, the data will remain stored when power is removed from the device. In contrast,
electronically stored information is considered volatile memory.
With the exception of
barcodes and optical character recognition data, electronic data storage is easier to revise and may be more cost effective than alternative methods due to smaller physical space requirements and the ease of replacing (rewriting) data on the same medium. However, the durability of methods such as printed data is still superior to that of most electronic storage media. The durability limitations may be overcome with the ease of duplicating (
backup) electronic data.
Terminology
Devices that are not used exclusively for recording (e.g. hands,
mouths,
musical instruments) and devices that are intermediate in the storing/retrieving process (e.g. eyes,
ears, cameras, Image scanners,
microphones,
Loudspeakers, Display devices,
projectors) are not usually considered storage devices. Devices that are exclusively for recording (e.g.
Computer printers), exclusively for reading (e.g. barcode readers), or devices that process only one form of information (e.g. phonographs) may or may not be considered storage devices. In
computing these are known as
input device/
output device devices.
An organic
brain may or may not be considered a data storage device. Ray Bradbury,
Fahrenheit 451, 1950, 1953 pp:150-152, ISBN 0345342968
All information is
data. However, not all data is information.
Data storage equipment
Any input/output equipment may be considered data storage equipment if it writes to and reads from a data storage medium. Data storage equipment uses either:
- portable methods (easily replaced),
- semi-portable methods requiring mechanical disassembly tools and/or opening a chassis, or
- inseparable methods meaning loss of memory if disconnected from the unit.
The following are examples of those methods:
Portable methods
Semi-portable methods
Inseparable methods
Recording medium
A recording medium is a physical material that holds data expressed in any of the existing
recording formats. With electronic media, the data and the recording medium is sometimes referred to as "software" despite the more common use of the word to describe
computer software. With (Media (arts)) static media, art materials such as crayons may be considered both equipment and medium as the wax, charcoal or chalk material from the equipment becomes part of the surface of the medium.
Some recording media may be temporary either by design or by nature. Volatile organic compounds may be used to
Sustainable design or to purposely make data expire over time. Data such as
smoke signals or
skywriting are temporary by nature. Depending on the volatility, a
gas (e.g.
atmosphere,
smoke) or a liquid surface such as a
lake would be considered a temporary recording medium if at all.
Ancient and timeless examples
Bible displayed by the United States Library of Congress, demonstrating printed pages as a storage medium.
- Optical
- Any Physical body visible to the eye, used to mark a location such as a, Rock (geology), flag or skull.
- Any arts and crafts material used to form shapes such as clay, wood, metal, glass, wax.
- Any branding surface that would scar under intense heat (chiefly for livestock branding or human branding).
- Any marking substance such as paint, ink or chalk.
- Any surface that would hold a marking substance such as, papyrus, paper, skin.
- Chemical
Modern examples by energy used
- Chemical
- Thermodynamic
- Photochemical
- Mechanical
- Pins and holes
- Punch card
- Paper tape
- Music box cylinder or disk
- Grooves (See also Audio storage)
- Magnetic storage
- Optical storage
- Electrical
Modern examples by shape
A typical way to classify data storage media is to consider its shape and type of movement (or non-movement) relative to the read/write device(s) of the storage apparatus as listed:
Bekenstein (2003) foresees that miniaturization might lead to the invention of devices that store
bits on a single atom.
See also
References
- Bekenstein, Jacob D. (2003, August). Information in the holographic universe. Scientific American.
Bibliography
External links
- Historical Notes about the Cost of Hard Drive Storage Space
image:Reel-to-reel recorder tc-630.jpg might be the oldest data storage medium , now replaced by DNA in most organisms.A
data storage device is a device for recording (storing) information (data). Recording can be done using virtually any form of [energy. A storage device may hold information, process information, or both. A device that only holds information is a recording medium. Devices that process information (data storage equipment) may either access a separate portable (removable) recording medium or a permanent component to store and retrieve information.
Electronic data storage is storage which requires electrical power to store and retrieve that data. Most storage devices that do not require visual optics to read data fall into this category. Electronic data may be stored in either an Analog signal or digital signal format. This type of data is considered to be electronically
encoder data, whether or not it is
semiconductor. Most electronic data storage media (including some forms of computer storage) are considered permanent (non-volatile) storage, that is, the data will remain stored when power is removed from the device. In contrast,
electronically stored information is considered
volatile memory.
With the exception of
barcodes and optical character recognition data, electronic data storage is easier to revise and may be more cost effective than alternative methods due to smaller physical space requirements and the ease of replacing (rewriting) data on the same medium. However, the durability of methods such as printed data is still superior to that of most electronic storage media. The durability limitations may be overcome with the ease of duplicating (backup) electronic data.
Terminology
Devices that are not used exclusively for recording (e.g. hands, mouths, musical instruments) and devices that are intermediate in the storing/retrieving process (e.g. eyes, ears,
cameras, Image scanners, microphones,
Loudspeakers,
Display devices, projectors) are not usually considered storage devices. Devices that are exclusively for recording (e.g.
Computer printers), exclusively for reading (e.g.
barcode readers), or devices that process only one form of information (e.g. phonographs) may or may not be considered storage devices. In computing these are known as
input device/
output device devices.
An organic
brain may or may not be considered a data storage device. Ray Bradbury,
Fahrenheit 451, 1950, 1953 pp:150-152, ISBN 0345342968
All information is
data. However, not all data is information.
Data storage equipment
Any input/output equipment may be considered data storage equipment if it writes to and reads from a data storage medium. Data storage equipment uses either:
- portable methods (easily replaced),
- semi-portable methods requiring mechanical disassembly tools and/or opening a chassis, or
- inseparable methods meaning loss of memory if disconnected from the unit.
The following are examples of those methods:
Portable methods
Semi-portable methods
Inseparable methods
- Circuitry with volatile memory Random access memory
- Neurons Aaron P. Nelson and Susan Gilbert, Harvard Medical School Guide to Achieving Optimal Memory, Mar 2005, page 66
Recording medium
A recording medium is a physical material that holds data expressed in any of the existing recording formats. With electronic media, the data and the recording medium is sometimes referred to as "software" despite the more common use of the word to describe computer software. With (Media (arts)) static media, art materials such as
crayons may be considered both equipment and medium as the wax, charcoal or chalk material from the equipment becomes part of the surface of the medium.
Some recording media may be temporary either by design or by nature.
Volatile organic compounds may be used to
Sustainable design or to purposely make data expire over time. Data such as
smoke signals or
skywriting are temporary by nature. Depending on the volatility, a
gas (e.g.
atmosphere, smoke) or a liquid surface such as a
lake would be considered a temporary recording medium if at all.
Ancient and timeless examples
Bible displayed by the United States
Library of Congress, demonstrating printed pages as a storage medium.
- Optical
- Any Physical body visible to the eye, used to mark a location such as a, Rock (geology), flag or skull.
- Any arts and crafts material used to form shapes such as clay, wood, metal, glass, wax.
- Any branding surface that would scar under intense heat (chiefly for livestock branding or human branding).
- Any marking substance such as paint, ink or chalk.
- Any surface that would hold a marking substance such as, papyrus, paper, skin.
- Chemical
Modern examples by energy used
- Chemical
- Thermodynamic
- Photochemical
- Mechanical
- Magnetic storage
- Optical storage
- Electrical
Modern examples by shape
A typical way to classify data storage media is to consider its shape and type of movement (or non-movement) relative to the read/write device(s) of the storage apparatus as listed:
- Paper card storage
- Tape storage (long, thin, flexible, linearly moving bands)
- Punched tape (mechanical)
- Magnetic tape (a tape passing one or more read/write/erase heads)
- Disk storage (flat, round, rotating object)
- Magnetic bubble memory
- Flash memory/memory card (solid state semiconductor memory)
Bekenstein (2003) foresees that miniaturization might lead to the invention of devices that store
bits on a single atom.
See also
References
- Bekenstein, Jacob D. (2003, August). Information in the holographic universe. Scientific American.
Bibliography
External links
- Historical Notes about the Cost of Hard Drive Storage Space
disk drive from FOLDOC
disk drive < hardware, storage > (Or "hard disk drive", "hard drive", "floppy disk drive", "floppy drive") A peripheral device that reads and writes hard disks or floppy disks.
hard disk drive from FOLDOC
hard disk drive < storage > (HDD) A disk drive used to read and write hard disks. (1995-03-14) Try this search on Wikipedia, OneLook, Google
disk drive
The Free Online Dictionary of Computing (http://foldoc.doc.ic.ac.uk/) is edited by Denis Howe < dbh@doc.ic.ac.uk >. Previous: disk controller Next: disk duplexing
Diskdrives & Data Storage [Diskdrives.org]
Diskdrives.org offers a wide variety of new harddisks, controllers, dvd/blu-ray drives, tape backup devices, and blank media. For home users and professionals.
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BBC NEWS | Technology | Factfile: Hard disk drive
A typical hard disk drive consists of a motor, spindle, platters, read/write heads, actuator and electronics.
Disk Depot Hard Drives | Disk Depot
2007 DiskDepot - UK online blank media store - blank DVDs, blank CDs and more - buy online now! blank DVDs, blank CDs | UK online store | Sitemap | Contact Us | Info
Hard disk drives HDD oems articles news daily on STORAGEsearch.com
Disk Jockey handheld USB / Firewire disk copier / eraser / tester / mirroring tool from Diskology
Maplin > 3.5in Floppy Disk Drive
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Disk storage - Wikipedia, the free encyclopedia
Disk storage is a general category of a computer storage mechanisms, in which data is recorded on planar, round and rotating surfaces (disks, discs, or platters).
