Primary storage, also known as main memory or RAM, is the area where data is stored temporarily for quick access by the CPU. Secondary storage refers to external storage devices like hard disks that retain data even when powered off. Secondary storage is needed because it has large capacity for storing operating systems and files, and is non-volatile unlike primary storage. Hard disks are an example of secondary storage - they are non-volatile, have large capacity, and use magnetic disks and heads to store and retrieve digital data.
The process of storing personal data or information for future use is called storage of data. Storage involves writing data to storage devices and reading it back from storage devices later. Common storage devices include hard disks, flash drives, optical discs, cloud storage, and tape drives. The amount of data a storage device can hold is called its storage capacity, which is typically measured in bytes, kilobytes, megabytes, or terabytes.
This article gives a complete review of computer storage devices, lists many examples of different types as well as introduces how to make use of them.
Backing storage is needed because main memory has limited storage. Backing storage devices include magnetic storage like hard disks, optical storage like CDs and DVDs, and solid state storage like memory cards and solid state drives. Magnetic storage uses magnetic fields to store data on disks or tape. Optical storage uses lasers to read pits and lands on disks. Solid state storage has no moving parts and is used in devices like memory cards, USB flash drives, and solid state drives. Interfaces like SATA, USB, and Thunderbolt allow backing storage devices to connect to computers.
This presentation provides an overview of different storage devices, including their basic units of data storage (bits, bytes, kilobytes, etc.), data access methods (random access vs sequential access), and specific device types. It discusses magnetic disks like hard disks, floppy disks, and zip disks. It also covers optical disks such as CDs, DVDs, and Blu-Ray disks. Finally, it examines flash memory storage options including solid state drives, USB flash drives, memory cards, and more.
Storage refers to saving digital data using computing technology either temporarily or permanently through storage devices like hard disks and flash drives. There are several types of storage systems including hard disk drives, solid state drives, USB flash drives, CDs/DVDs. Hard disk drives use magnetic disks to store operating systems and files, while solid state drives use flash memory and have no moving parts, making them faster than hard drives. Other storage media include USB flash drives, CDs, which can store audio, video and data through focusing a laser onto its tracks, and databases, which collect and organize information for easy access and analysis.
The document discusses various components of computer hardware. It describes the motherboard as the central circuit board that connects other components like the CPU, RAM, firmware, and buses. The CPU, or central processing unit, executes computer programs by fetching, decoding, executing, and writing back instructions. RAM, or random access memory, is fast memory that stores currently running programs and is cleared when powering down the computer. Removable media like CDs, DVDs, Blu-ray discs, floppy disks, and others allow storing and transferring data externally. Internal storage components include hard disk drives, solid state drives, and disk array controllers for persistent data storage inside the computer.
The document discusses various storage media including hard drives, floppy disks, tape, Zip disks, CDs, DVDs, Blu-ray discs, USB flash drives, memory cards, and solid state drives. It provides details on the capabilities, uses, advantages and limitations of each type of storage medium. The key points are that storage media are any devices or materials used to store data, and range from internal hard drives to removable options like disks, cards, and drives that allow transferring and sharing data between computers or other devices.
Primary storage, also known as main memory or RAM, is the area where data is stored temporarily for quick access by the CPU. Secondary storage refers to external storage devices like hard disks that retain data even when powered off. Secondary storage is needed because it has large capacity for storing operating systems and files, and is non-volatile unlike primary storage. Hard disks are an example of secondary storage - they are non-volatile, have large capacity, and use magnetic disks and heads to store and retrieve digital data.
The process of storing personal data or information for future use is called storage of data. Storage involves writing data to storage devices and reading it back from storage devices later. Common storage devices include hard disks, flash drives, optical discs, cloud storage, and tape drives. The amount of data a storage device can hold is called its storage capacity, which is typically measured in bytes, kilobytes, megabytes, or terabytes.
This article gives a complete review of computer storage devices, lists many examples of different types as well as introduces how to make use of them.
Backing storage is needed because main memory has limited storage. Backing storage devices include magnetic storage like hard disks, optical storage like CDs and DVDs, and solid state storage like memory cards and solid state drives. Magnetic storage uses magnetic fields to store data on disks or tape. Optical storage uses lasers to read pits and lands on disks. Solid state storage has no moving parts and is used in devices like memory cards, USB flash drives, and solid state drives. Interfaces like SATA, USB, and Thunderbolt allow backing storage devices to connect to computers.
This presentation provides an overview of different storage devices, including their basic units of data storage (bits, bytes, kilobytes, etc.), data access methods (random access vs sequential access), and specific device types. It discusses magnetic disks like hard disks, floppy disks, and zip disks. It also covers optical disks such as CDs, DVDs, and Blu-Ray disks. Finally, it examines flash memory storage options including solid state drives, USB flash drives, memory cards, and more.
Storage refers to saving digital data using computing technology either temporarily or permanently through storage devices like hard disks and flash drives. There are several types of storage systems including hard disk drives, solid state drives, USB flash drives, CDs/DVDs. Hard disk drives use magnetic disks to store operating systems and files, while solid state drives use flash memory and have no moving parts, making them faster than hard drives. Other storage media include USB flash drives, CDs, which can store audio, video and data through focusing a laser onto its tracks, and databases, which collect and organize information for easy access and analysis.
The document discusses various components of computer hardware. It describes the motherboard as the central circuit board that connects other components like the CPU, RAM, firmware, and buses. The CPU, or central processing unit, executes computer programs by fetching, decoding, executing, and writing back instructions. RAM, or random access memory, is fast memory that stores currently running programs and is cleared when powering down the computer. Removable media like CDs, DVDs, Blu-ray discs, floppy disks, and others allow storing and transferring data externally. Internal storage components include hard disk drives, solid state drives, and disk array controllers for persistent data storage inside the computer.
The document discusses various storage media including hard drives, floppy disks, tape, Zip disks, CDs, DVDs, Blu-ray discs, USB flash drives, memory cards, and solid state drives. It provides details on the capabilities, uses, advantages and limitations of each type of storage medium. The key points are that storage media are any devices or materials used to store data, and range from internal hard drives to removable options like disks, cards, and drives that allow transferring and sharing data between computers or other devices.
Digital storage takes many forms and provides different capabilities. Storage media is the physical material that stores data, while storage devices access and retrieve stored information. Common storage technologies include magnetic hard disks with platters and read/write heads, solid state drives using flash memory, optical discs like CDs and DVDs, as well as cloud storage over the internet. Larger organizations rely on enterprise storage solutions such as network attached storage, tape drives, and RAID configurations to manage and back up large volumes of data reliably.
There are two main types of storage devices: primary and secondary. Primary storage devices, like RAM and cache, are internal and hold data temporarily at high speeds. Secondary storage devices, like hard disk drives, USB drives, CDs, and memory cards, can be internal or external and store data permanently in large capacities. Common examples of primary storage devices are RAM, which temporarily stores frequently used data for high access speeds, and cache memory. Common examples of secondary storage devices are hard disk drives, which store data on spinning magnetic disks; USB drives, also known as flash drives or pen drives, which are portable solid-state memory storage; optical discs like CDs and DVDs, which use lasers to read and write data
The document discusses various types of storage media including hard drives, floppy disks, tape, Zip disks, CDs, DVDs, Blu-ray discs, USB flash drives, memory cards, solid state drives, and cloud storage. It provides details on the capabilities and uses of each medium. Hard drives can permanently store large amounts of data but are not portable, while removable media like floppy disks, Zip disks, CDs, DVDs, and USB flash drives allow portability but have more limited storage capacity. Newer technologies like solid state drives and cloud storage provide higher speeds and capacity.
The document provides information about secondary storage. It begins by defining secondary storage as non-volatile, long-term storage used to store programs and data when a computer is switched off. The main types of secondary storage are magnetic storage devices like hard disk drives. Advantages of secondary storage include safety, reliability, permanence, and ability to store huge volumes of data cheaply. Disadvantages are slower speed compared to primary storage. Common secondary storage devices discussed include hard disks, optical discs like CDs and DVDs, USB flash drives, memory cards, and smart cards.
The document discusses different types of internal and external storage devices. For internal devices, it describes hard disk drives (HDD), solid state drives (SSD), hybrid hard drives (HHD), and the connectors and controllers used. For external devices it mentions USB flash drives, CDs, DVDs, and Blu-ray discs. It also provides information on identifying storage capacity from the device sticker, operating system, or BIOS, and lists several common hard drive manufacturers.
This document discusses different techniques for data storage, retrieval, and playback of multimedia files. It describes various storage media like optical disks and hard drives that can be used to store multimedia. Retrieval of multimedia depends on whether the file is continuous or discrete media. There are different access techniques for retrieving data like sequential, direct, and index sequential access. Magnetic storage uses magnetization patterns to store data on mediums like hard disks or floppy disks. Optical disks like CDs and DVDs also store data that can be read with lasers. Disk spanning allows data to exceed storage capacities by spreading across multiple disks.
Primary storage refers to memory in a computer system like RAM and ROM. Secondary storage is provided by peripheral devices like hard disks, floppy disks, optical disks, and tape drives to store large amounts of data outside of memory. Secondary storage is required for three reasons: 1) memory contents are volatile and lost when power is disconnected, 2) memory capacity is limited, and 3) memory is more expensive than secondary storage. Common secondary storage devices include floppy disks, hard disks, CDs, DVDs, and tape drives used for backups.
Secondary storage benefits include space, reliability, convenience and economy. Common storage media include hard disks, floppy disks, CDs, DVDs and portable drives. Data is organized on disks through formatting into tracks and sectors. Files can be organized sequentially, directly, or through indexes for access. Multimedia integrates various media types for presentations.
Secondary storage benefits include space, reliability, convenience and economy. Common storage media include hard disks, floppy disks, CDs, DVDs and portable drives. Data is organized on disks through formatting into tracks and sectors. Files can be organized sequentially, directly, or through indexes for access. Multimedia combines various media types for presentations.
Hard disks are circular magnetic storage devices that store information. They typically spin at 3,600 RPM and have read/write heads that move within 10-25 millionths of an inch across the disk surface. IDE and SATA are common interfaces that connect hard disks to computers. IDE supports up to four devices across two channels while SATA provides faster speeds and hot-swapping. SCSI interfaces provide more consistent transfer speeds independent of the CPU compared to IDE, making them suitable for multimedia or CAD work. Optical disks like CDs and DVDs store information using lasers to read information encoded in pits on the disk surface. Rewritable disks like CD-RWs and DVD-RWs allow erasing and rewriting
This document discusses different types of computer storage. It describes primary storage, which stores data during operations like RAM and ROM, and secondary storage, which stores data permanently like hard disks, flash drives, and optical discs. Hard disks are discussed in detail, including their components, recording techniques, controllers, and different types. Other storage devices covered include solid state drives, memory cards, USB flash drives, cloud storage, optical discs, tape, magnetic stripe cards, smart cards, microfilm, and enterprise storage solutions.
A portable storage device (PSD) is a small hard drive designed to hold any kind of digital data. This is slightly different from a portable media player, which stores and plays music and movies. Some are fixed size hard drives of 256GB, 320GB, etc.
This document discusses various computer storage devices. It begins by defining basic units of storage like bits, bytes, kilobytes, megabytes, etc. It then describes different types of primary storage devices like RAM and ROM as well as secondary storage devices like hard disks, CDs, DVDs, flash memory, and magnetic tapes. Specific storage devices are then discussed in more detail including hard disks, optical discs, magnetic disks, disk caches, and various memory cards. The document concludes by covering other older storage technologies like zip disks and super disks.
Computer storage consists of primary and secondary memory. Primary memory, like registers and RAM, is directly accessible by the CPU while secondary memory, like hard disks, requires input/output channels. There are different types of secondary storage such as magnetic disks, optical disks, flash memory, and tape drives. Magnetic disks store data via polarized iron particles on disks or platters. Optical disks use lasers to burn data in spiral patterns onto disks. Flash memory cards have no moving parts. Tertiary memory provides robotic mounting and dismounting of removable media.
This document summarizes different types of computer storage devices. It discusses basic units of data storage such as bits, bytes, kilobytes etc. It describes different data access methods for storage devices including random access memory and sequential access memory. The document provides details about various storage devices like magnetic disks, optical disks, solid state drives, USB flash drives and memory cards. It explains technologies like hard disks, floppy disks, zip disks, CDs, DVDs and Blu-ray disks.
This document summarizes different types of computer storage devices. It discusses basic units of data storage such as bits, bytes, kilobytes etc. It describes different data access methods for storage devices including random access memory and sequential access memory. The document provides details about various storage devices like magnetic disks, optical disks, solid state drives, USB flash drives and memory cards. It explains technologies like hard disks, floppy disks, zip disks, CDs, DVDs and Blu-ray disks.
The document describes different types of storage devices including audio cassettes, video cassettes, hard disks, floppy disks, compact discs, and flash drives. It explains that audio and video cassettes use magnetic tape to store sound and video information. Hard disks use rapidly spinning magnetic disks to store data in a random-access manner. Floppy disks and compact discs are magnetic and optical storage media, while flash drives are small, removable electronic storage devices.
Digital storage takes many forms and provides different capabilities. Storage media is the physical material that stores data, while storage devices access and retrieve stored information. Common storage technologies include magnetic hard disks with platters and read/write heads, solid state drives using flash memory, optical discs like CDs and DVDs, as well as cloud storage over the internet. Larger organizations rely on enterprise storage solutions such as network attached storage, tape drives, and RAID configurations to manage and back up large volumes of data reliably.
There are two main types of storage devices: primary and secondary. Primary storage devices, like RAM and cache, are internal and hold data temporarily at high speeds. Secondary storage devices, like hard disk drives, USB drives, CDs, and memory cards, can be internal or external and store data permanently in large capacities. Common examples of primary storage devices are RAM, which temporarily stores frequently used data for high access speeds, and cache memory. Common examples of secondary storage devices are hard disk drives, which store data on spinning magnetic disks; USB drives, also known as flash drives or pen drives, which are portable solid-state memory storage; optical discs like CDs and DVDs, which use lasers to read and write data
The document discusses various types of storage media including hard drives, floppy disks, tape, Zip disks, CDs, DVDs, Blu-ray discs, USB flash drives, memory cards, solid state drives, and cloud storage. It provides details on the capabilities and uses of each medium. Hard drives can permanently store large amounts of data but are not portable, while removable media like floppy disks, Zip disks, CDs, DVDs, and USB flash drives allow portability but have more limited storage capacity. Newer technologies like solid state drives and cloud storage provide higher speeds and capacity.
The document provides information about secondary storage. It begins by defining secondary storage as non-volatile, long-term storage used to store programs and data when a computer is switched off. The main types of secondary storage are magnetic storage devices like hard disk drives. Advantages of secondary storage include safety, reliability, permanence, and ability to store huge volumes of data cheaply. Disadvantages are slower speed compared to primary storage. Common secondary storage devices discussed include hard disks, optical discs like CDs and DVDs, USB flash drives, memory cards, and smart cards.
The document discusses different types of internal and external storage devices. For internal devices, it describes hard disk drives (HDD), solid state drives (SSD), hybrid hard drives (HHD), and the connectors and controllers used. For external devices it mentions USB flash drives, CDs, DVDs, and Blu-ray discs. It also provides information on identifying storage capacity from the device sticker, operating system, or BIOS, and lists several common hard drive manufacturers.
This document discusses different techniques for data storage, retrieval, and playback of multimedia files. It describes various storage media like optical disks and hard drives that can be used to store multimedia. Retrieval of multimedia depends on whether the file is continuous or discrete media. There are different access techniques for retrieving data like sequential, direct, and index sequential access. Magnetic storage uses magnetization patterns to store data on mediums like hard disks or floppy disks. Optical disks like CDs and DVDs also store data that can be read with lasers. Disk spanning allows data to exceed storage capacities by spreading across multiple disks.
Primary storage refers to memory in a computer system like RAM and ROM. Secondary storage is provided by peripheral devices like hard disks, floppy disks, optical disks, and tape drives to store large amounts of data outside of memory. Secondary storage is required for three reasons: 1) memory contents are volatile and lost when power is disconnected, 2) memory capacity is limited, and 3) memory is more expensive than secondary storage. Common secondary storage devices include floppy disks, hard disks, CDs, DVDs, and tape drives used for backups.
Secondary storage benefits include space, reliability, convenience and economy. Common storage media include hard disks, floppy disks, CDs, DVDs and portable drives. Data is organized on disks through formatting into tracks and sectors. Files can be organized sequentially, directly, or through indexes for access. Multimedia integrates various media types for presentations.
Secondary storage benefits include space, reliability, convenience and economy. Common storage media include hard disks, floppy disks, CDs, DVDs and portable drives. Data is organized on disks through formatting into tracks and sectors. Files can be organized sequentially, directly, or through indexes for access. Multimedia combines various media types for presentations.
Hard disks are circular magnetic storage devices that store information. They typically spin at 3,600 RPM and have read/write heads that move within 10-25 millionths of an inch across the disk surface. IDE and SATA are common interfaces that connect hard disks to computers. IDE supports up to four devices across two channels while SATA provides faster speeds and hot-swapping. SCSI interfaces provide more consistent transfer speeds independent of the CPU compared to IDE, making them suitable for multimedia or CAD work. Optical disks like CDs and DVDs store information using lasers to read information encoded in pits on the disk surface. Rewritable disks like CD-RWs and DVD-RWs allow erasing and rewriting
This document discusses different types of computer storage. It describes primary storage, which stores data during operations like RAM and ROM, and secondary storage, which stores data permanently like hard disks, flash drives, and optical discs. Hard disks are discussed in detail, including their components, recording techniques, controllers, and different types. Other storage devices covered include solid state drives, memory cards, USB flash drives, cloud storage, optical discs, tape, magnetic stripe cards, smart cards, microfilm, and enterprise storage solutions.
A portable storage device (PSD) is a small hard drive designed to hold any kind of digital data. This is slightly different from a portable media player, which stores and plays music and movies. Some are fixed size hard drives of 256GB, 320GB, etc.
This document discusses various computer storage devices. It begins by defining basic units of storage like bits, bytes, kilobytes, megabytes, etc. It then describes different types of primary storage devices like RAM and ROM as well as secondary storage devices like hard disks, CDs, DVDs, flash memory, and magnetic tapes. Specific storage devices are then discussed in more detail including hard disks, optical discs, magnetic disks, disk caches, and various memory cards. The document concludes by covering other older storage technologies like zip disks and super disks.
Computer storage consists of primary and secondary memory. Primary memory, like registers and RAM, is directly accessible by the CPU while secondary memory, like hard disks, requires input/output channels. There are different types of secondary storage such as magnetic disks, optical disks, flash memory, and tape drives. Magnetic disks store data via polarized iron particles on disks or platters. Optical disks use lasers to burn data in spiral patterns onto disks. Flash memory cards have no moving parts. Tertiary memory provides robotic mounting and dismounting of removable media.
This document summarizes different types of computer storage devices. It discusses basic units of data storage such as bits, bytes, kilobytes etc. It describes different data access methods for storage devices including random access memory and sequential access memory. The document provides details about various storage devices like magnetic disks, optical disks, solid state drives, USB flash drives and memory cards. It explains technologies like hard disks, floppy disks, zip disks, CDs, DVDs and Blu-ray disks.
This document summarizes different types of computer storage devices. It discusses basic units of data storage such as bits, bytes, kilobytes etc. It describes different data access methods for storage devices including random access memory and sequential access memory. The document provides details about various storage devices like magnetic disks, optical disks, solid state drives, USB flash drives and memory cards. It explains technologies like hard disks, floppy disks, zip disks, CDs, DVDs and Blu-ray disks.
The document describes different types of storage devices including audio cassettes, video cassettes, hard disks, floppy disks, compact discs, and flash drives. It explains that audio and video cassettes use magnetic tape to store sound and video information. Hard disks use rapidly spinning magnetic disks to store data in a random-access manner. Floppy disks and compact discs are magnetic and optical storage media, while flash drives are small, removable electronic storage devices.
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4. Storage System Chracteristics
All storage systems have specific chracteristics,
such as having both a storage medium and a
storage devices, how portable and volatile the
system is, how data is accessed and represented,
and the type of storage technology used. These
chracteristics are discussed in next few sections.
5. Storage Media and Storage Devices
Characteristics
Volatility
Random vs Sequential access
Logical vs Physical Representation
Types of Storage Technology Used
6. Storage Media and Storage Devices
Storage media:
The part of storage system where data is stored
Medium is inserted into device to be used
Example DVD disc,flash memory card etc
Storage devices:
A piece of hardwere into which a storage
medium is inserted to be read from or written
to.
Storage devices are typically identified by letter
Example DVD drive,flash memory card reader
7. Random vs sequential access
Random
access:
The data can be retrieved directly from one location to
another on the storage medium
A DVD player used to play music or movies so it can jump
directly to a particular locations on the medium when
data located at that location is needed
Sequential
access:
In sequential,the data can only be reyrieved in the order
in which it is physically stored on the medium
Magnetic tape drive is type of storage devices that is
used with computers for backup purpose
8. Logical vs physical
representations
Logical representations:
The user’s view of the way data is stored
Anything stored on storage medium is reffered as a file
When document was created is stored as a new file on
the storage designated by the user during storage
process,the user is required to give the file a name
called a filename
To keep file organized,related document are often
stored in folders located on the storage medium
Physical representations:
The actual physical way the data is stored on the
storage media as viewed by the computer
9. Hard Drives
A hard disk drive (sometimes abbreviated as a hard drive, HD,
or HDD) is a non-volatile data storage device. It is usually
installed internally in a computer, attached directly to the disk
controller of the computer's motherboard.
10. Types and Chracteristics
Magnetic Hard Drives
Solid State Drives(SSDs)
Solid State Hybrid Drives(SSHDs)
Internal vs External Hard Drives
Hard Drive Speed and Disk Caching
Hard Drive Partitioning and File System
Hard Drive Interface Standards
11. Optical Disk And Drives
Optical Disk;
A type of storage
medium that use laser
beam to read and write
data. Data in optical disk
read and write optically.
Types of optical disk
CDs
DVDs
Blu-ray discs
12. DIFFERENCE BETWEEN CD AND DVD
CD DVD
“CDs” stands for compact disk.
CDs can store up to 7oo MB
of data.
A CDs can store audio,
videos, music and document
under the size of 700 MB.
“DVDs’’ stands for digital video disk.
DVDs can store up to 8.4 GB of
data.
A DVDs can also store all type of
data in including text, graphic,
audio data but its storage capacity
is higher then of “CDs”
13. Optical Drives.
The drives that
use to read and
write data on a
optical disc like
CDs and DVDs
called a optical
drives.
14. Optical disc shapes, sizes, and capacities
Size;
Standard sized optical discs are 120mm (approximately 4.7
inch).
Shape;
Shape of a optical discs can be a heart, a triangle, an irregular
shape.
Capacity;
capacity of the disc depends on the type of optical discs like a
CDs has a capacity of 700 MB and DVDs has capacity of storing
data.
16. Optical Discs and Drives
An optical disc drive (ODD) in a computer system allows you to
use CDs, DVDs, and Blu-ray discs to listen to music or watch a
movie. Most drives also allow you to write data to a disc, so
you can create your own music CDs, video DVDs or even create
of back-up copy of your important data files.
17. Optical Discs Characteristics
Read-Only Optical Discs(CD-ROM,DVD-ROM and BD-ROM)
Recordable Optical Discs(CD-R,DVD-R,DVD+R and BD-R)
Rewritable Optical Discs(CD-RW,DVD-RW,DVD+RW and
BD-RW)
18. Flash Memory Storage Systems
Flash memory is a non-volatile
memory chip used for storage and
for transferring data between a
personal computer (PC) and digital
devices. It is often found in USB
flash drives, MP3 players, digital
cameras and solid-state drives.
Definition:
19. Types OF FLASH MOMARY
Embedded Flash Memory
Flash Memory Cards and Readers
USB Flash Drives
20. Embedded Flash Memory
Embedded Flash Memory refers to
flash memory chips embedded into
product.
It is used in smartphones, tablets,
smart watches etc.
it is primary storage which provide
built-in storage such as SSDs.
21. Flash Memory Cards and
Readers
Small cards contain many flash
chips. Use to store data.
It available in capacities up to 512
GB.
Card readers use to reading flash
memory cards
Micro SD , HDSC, SD are Some
example of flash memory card.
22. USB Flash Drives
A small storage device that plugs
into a USB port and contain flash
memory media.
It is very small in size and very
portable.
It can be store data up to 1TB.
25. Other Types of Storage Systems
Network
Storage
System
Cloud
Storage
System
Smart
Cards
26. Network Storage Systems
A NAS system is a storage
device connected to a
network that allows storage
and retrieval of data from a
centralized location for
authorized network users
and heterogeneous clients
28. Network Attached Storage (NAS)
o Network-attached storage (NAS) is
a file-level computer data
storage server connected to
a computer network providing data
access to a heterogeneous group
of clients.
29. Storage Area Network (SAN)
A storage area network
(SAN) is a dedicated,
independent high-speed
network that
interconnects and
delivers shared pools of
storage devices to
multiple servers.
SANs are primarily used
to access data storage
devices, such as disk
arrays and tape libraries
from servers.
30. Direct Attached Storage (DAS)
Direct-attached storage, or DAS,
is a digital storage system that
connects directly to a personal
computer, workstation, or server,
but is not attached to a network
31. Cloud Storage Network
Cloud storage is a service model in
which data is transmitted and
stored on remote storage systems,
where it is maintained, managed,
backed up and made available to
users over a network typically, the
internet
32. Smart Cards
o A smart card is a device that includes
an embedded integrated circuit chip
(ICC) that can be either a secure
microcontroller or equivalent
intelligence with internal memory or a
memory chip alone
33. ID
Verificatio
n
Uses of Smart Cards
Bankin
g &
Retail
HealthCare
ATM
Cards
Comput
er &
Network
Security
Mobile
Communicatio
ns
34. RAID Storage
• RAID (redundant array of
independent disks) is a way of
storing the same data in different
places on multiple hard disks or
solid-state drives (SSDs) to protect
data in the case of a drive failure.
35. Archival Storage System
Data archiving is the process of identifying
and moving data that is no longer actively
being used from regular storage systems
long-term archival system.
Data achieving is important because that is a
great deal of data that needs to be retained
for future reference.