Browse Definitions:
Reference

Fast Guide to Storage Technologies

This printable page provides a fast guide in table form to storage technologies. To the extent that some technologies depend on other technologies (for example, a storage area network depends on either Fibre Channel or iSCSI for its connection protocol), there is a certain amount of redundancy among some table entries.

 Object Storage  -- Click here to learn more about this emerging storage technology
 

Technology

Advantages

Limitations

Applications

Compact disc, recordable
( CD-R ) or rewritable ( CD-RW ) and DVD
  • Low cost per megabyte
  • Unlimited capacity with multiple discs
  • Portable
  • Widely-supported I/O interfaces
  • Can be formatted for different data formats
  • Long life
  • High data density
  • Immune to corruption once data is written (CD-R and DVD only)
  • Limited capacity on one disc(though much greater than diskette)
  • Slow to moderate read/write speed
  • Data archiving
  • Data distribution
  • Data migration
  • Localized file sharing
  • Offsite storage
Technology

Advantages

Limitations

Applications

Diskettes, 1.44 MB
  • Simple to use
  • Portable
  • Can be formatted for different data formats
  • Limited capacity
  • Limited read/write speed
  • Not supported by many newer computers
  • Local data transfer of small files
  • Storage of small files or programs
Technology

Advantages

Limitations

Applications

Hard drive, external
  • High read/write speed
  • Can be moved among computers
  • Limited capacity
  • Awkward for data transfer among multiple computers
  • Local backup
  • Local archiving
Technology

Advantages

Limitations

Applications

Hard drive, internal
  • Convenient; usually comes with the computer
  • High read/write speed
  • Convenient for use with single computer (but can be shared among multiple computers with proper support
  • Most common form of data storage
  • Limited capacity
  • Without special support, confined to a single computer or server
  • Storage in a single computer
  • Swap files
Technology

Advantages

Limitations

Applications

Removable storage
(ZIP disks, JAZ disks, etc.)
  • Simplicity
  • Portability
  • Unlimited capacity with multiple disks
  • Convenient for use with single computer
  • Proprietary media
  • Limited read/write speed
  • High cost per megabyte
  • Personal computing
  • Local data transfer of small files
  • Local backup
  • Local archiving
Technology

Advantages

Limitations

Applications

Solid-state storage
(USB devices, flash memory, smart cards, etc.)
  • No mechanical parts
  • High read/write speed
  • Small form factor
  • Limited storage capacity
  • High cost per I/O operation
  • Swap files
  • Local data transfer
  • Internet service providers
  • Video processing
  • Relational databases
  • High-speed data acquisition
Technology

Advantages

Limitations

Applications

Direct-attached storage
(DAS)
  • Simplicity
  • Low initial cost
  • Ease of management
  • Storage for each server must be administered separately
  • Inconvenient for data transfer in network environments
  • Server bears load of processing applications
  • Data and application sharing
  • Data backup
  • Data archiving
Technology

Advantages

Limitations

Applications

Disk library
  • High speed
  • High storage capacity
  • High data availability
  • Not as quickly accessible as DAS; intended for "write once, read rarely" data
  • Disk-to-disk (D2D) backup
  • Data archiving
  • Near line storage
Technology

Advantages

Limitations

Applications

Disk-to-disk-to-tape
( D2D2T )
  • Redundancy
  • High read/write speed
  • Unlimited capacity with multiple tapes
  • Complexity
  • Incremental backups
  • Storage virtualization
  • Offsite storage
  • Data archiving
Technology

Advantages

Limitations

Applications

Fibre Channel
(See Storage area network below)
  • Used to transmit data between devices at gigabit speeds
  • Frequently used in storage area networks (SANs)
  • Flexible in terms of distance
  • High cost
  • Management complexity
  • Large databases
  • Bandwidth-intensive applications
  • Storage area networks (SANs)
  • Offsite storage
  • Mission-critical applications
Technology

Advantages

Limitations

Applications

iSCSI
(See Storage area network below)
  • Used to transmit data between devices using the Internet Protocol (IP)
  • Frequently used in storage area networks (SANs)
  • More flexible in terms of distance than Fibre Channel (but not as fast)
  • May not compare favorably with Fibre Channel for large database transfers
  • Management complexity
  • Applications involving remotely distributed databases
  • Storage area networks (SANs)
  • Offsite storage
  • Mission-critical applications
Technology

Advantages

Limitations

Applications

Magnetic tape
  • Low cost per megabyte
  • Portability
  • Unlimited capacity with multiple tapes
  • Inconvenient for quick recovery of individual files or groups of files
  • Data archiving
  • Limited-budget businesses
  • Offsite storage
Technology

Advantages

Limitations

Applications

Network-attached storage
(NAS)
  • Fast file access for multiple clients
  • Ease of data sharing
  • High storage capacity
  • Redundancy
  • Ease of drive mirroring
  • Consolidation of resources
  • Less convenient than storage area network (SAN) for moving large blocks of data
  • Data backup
  • Data archiving
  • Redundant storage
Technology

Advantages

Limitations

Applications

Redundant array of independent disks
(RAID)
  • High speed
  • High storage capacity
  • High data availability
  • High reliability
  • Security
  • Fault tolerance
  • Users may develop false sense of security
  • Recovery from failure is difficult in some systems
  • High cost for optimum systems
  • Swap files
  • Internet service providers
  • Redundant storage
Technology

Advantages

Limitations

Applications

Storage area network
(SAN)
  • Excellent for moving large blocks of data
  • Exceptional reliability
  • Wide availability
  • Fault tolerance
  • Scalability
  • High cost
  • Lack of standardization
  • Management complexity
  • Large databases
  • Bandwidth-intensive applications
  • Mission-critical applications

 

Read more about it at:
> SearchStorage.com provides a "Learning Guide: SAN."
> SearchStorage.com also provides a "Storage University."
> "Fast Guide to RAM" provides a quick guide to the various RAM technologies.
This was last updated in February 2010

Start the conversation

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

-ADS BY GOOGLE

Dateiendungen und Dateiformate

Gesponsert von:

SearchCompliance

  • internal audit (IA)

    An internal audit (IA) is an organizational initiative to monitor and analyze its own business operations in order to determine ...

  • pure risk (absolute risk)

    Pure risk, also called absolute risk, is a category of threat that is beyond human control and has only one possible outcome if ...

  • risk assessment

    Risk assessment is the identification of hazards that could negatively impact an organization's ability to conduct business.

SearchSecurity

  • phishing

    Phishing is a form of fraud in which an attacker masquerades as a reputable entity or person in email or other communication ...

  • vulnerability disclosure

    Vulnerability disclosure is the practice of publishing information about a computer security problem, and a type of policy that ...

  • incident response

    Incident response is an organized approach to addressing and managing the aftermath of a security breach or cyberattack, also ...

SearchHealthIT

SearchDisasterRecovery

  • business continuity and disaster recovery (BCDR)

    Business continuity and disaster recovery (BCDR) are closely related practices that describe an organization's preparation for ...

  • business continuity plan (BCP)

    A business continuity plan (BCP) is a document that consists of the critical information an organization needs to continue ...

  • call tree

    A call tree -- sometimes referred to as a phone tree -- is a telecommunications chain for notifying specific individuals of an ...

SearchStorage

  • flash memory

    Flash memory, also known as flash storage, is a type of nonvolatile memory that erases data in units called blocks.

  • NAND flash memory

    NAND flash memory is a type of nonvolatile storage technology that does not require power to retain data.

  • NOR flash memory

    NOR flash memory is one of two types of nonvolatile storage technologies.

SearchSolidStateStorage

  • hybrid hard disk drive (HDD)

    A hybrid hard disk drive is an electromechanical spinning hard disk that contains some amount of NAND Flash memory.

Close