Advantages of Flash Memory | disadvantages of Flash Memory

This page covers advantages and disadvantages of Flash Memory. It mentions Flash Memory advantages or benefits and Flash Memory disadvantages or drawbacks. It also describes Flash Memory basics.

What is Flash Memory?

• It is a type of EEPROM chip.
• It holds memory content with power off i.e. it is non-volatile memory.
• It uses key device called floating gate transistor for its operation.
• It is used in pen drives and small cards.
• There are two main types viz. NAND flash and NOR flash.
• Examples: USB flash drive, solid state drive etc.

Flash memory

NAND Flash: • It has smallest bit cell size, access bytes/words sequentially
NOR Flash: • Slightly larger bit cell size, access bytes/words random or sequentially
Refer Flash Memory basics and types>>.

Benefits or advantages of Flash Memory

Following are the benefits or advantages of Flash Memory:
➨It saves data when power is OFF. It is non-volatile and hence preserve state without any power.
➨Large and increased capacity
➨High transferring speed, hence it has faster read and write compare to traditional hard disk drives.
➨Small size, portability
➨Low power consumption than traditional hard disk drives
➨Work more quietly than physical hard drive
➨Less prone to damage
➨Cheaper compare to traditional drives in small storage capacities.
➨It does not have any moving parts larger than electrons.

Drawbacks or disadvantages of Flash Memory

Following are the disadvantages of Flash Memory:
➨High price compare to hard disks (cost per MB)
➨Limited number of reads/writes before failing. Cells wear out after 10,000 to 1M erasings.
➨Easy to lose due to its smaller size
➨May require special version of program to run on flash-based drive to protect from prematurely wearing out of the drive.
➨Writing (1->0) is expensive.
➨Erasing (0->1) is super expensive.
➨Reading disturbs nearby cells and hence it can not read same cell too many times.

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