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storage hierarchy

   Also found in: Wikipedia 0.01 sec.
storage hierarchy
The range of memory and storage devices within the computer system. The following list starts with the slowest devices and ends with the fastest. See storage and memory.

      VERY SLOW

   Punch cards (obsolete)
   Punched paper tape (obsolete)

      FASTER

   Bubble memory
   Floppy disks

      MUCH FASTER

   Magnetic tape
   Optical discs (CD-ROM, DVD-ROM, MO, etc.)
   Magnetic disks with movable heads
   Magnetic disks with fixed heads (obsolete)
   Low-speed bulk memory

      FASTEST

   Flash memory
   Main memory
   Cache memory
   Microcode
   Registers


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What most of the industry sees as ILM at the moment is in fact DLM--controlling the movement of data across the storage hierarchy depending on its value to the business.
Hitting a moving target how today's DLM technology can help achieve ... by Bruce, Alec / Database and Network Journal
Though no one knew it at the time, two key events in the storage industry had occurred; 1) the storage hierarchy was created with online and offline storage and 2) the first storage management applications were born, namely backup and recovery.
Building practical data protection strategies by Moore, Fred / Computer Technology Review
The need is understood, but few sites have opted for a storage [security] appliance because it adds yet another layer to the storage hierarchy.
Data protection by Information Age (London, UK)
 
 
 
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