 The size of a minimal chunk (page) for read operations is much smaller than the minimal chunk size (block) for write/erase operations, resulting in an undesirable phenomenon called write amplification that limits the random write performance and write endurance of flash-based solid-state storage devices.Another type of solid-state storage devices uses volatile random-access memory (RAM) combined with a battery that allows the contents of RAM to be preserved for a limited amount of time after the device's power supply is interrupted.As an advantage, RAM-based solid-state storage is much faster compared to flash, and does not experience write amplification.