What are the differences between Memory and Storage devices?



Though it may seem from the names that memory and storage devices are same thing, but actually they are far different. Following are the differences between Memory and Storage Devices.



Differences between memory and storage devices:




Term
Memory
Storage
Speed
Very speedy, that is, it responds very fast
Slower than memory devices
Cost
Very expensive compared to storage devices
Less expensive when compared to memory devices
Storage Type
Mostly volatile
Non-volatile
Impact on Performance
Has high impact on overall computer performance
Has low impact on overall computer performance
Accessible by
Can be accessed by CPU and programs
Can be accessed by both CPU, programs and users
Required Size
Generally requires less in storing capability
Generally requires more in storing capability
Importance
Memory is a required component of a computer
Storage is not a required component
Alternative use
Can’t be used as an storage device
Can be used as a memory device

Examples:

  1. Memory: RAM, ROM. Cache Memory etc.
  2. Storage Devices: Hard Disk Drive, Optical Disks etc.

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