disk cache memory

Disk cache memory is a supplementary memory system that stores frequently used instructions and data for faster processing by a computer's central processing unit (CPU). It acts as an extension of the computer's main memory, holding copies of the most accessed information or program codes.1

When the CPU needs data, it first checks the cache. If the data is present, it's quickly returned to the CPU. If not, the CPU retrieves it from the main memory. Disk cache memory functions similarly but specifically holds data recently written to or retrieved from external storage devices like magnetic disks. A RAM disk is a section of random-access memory configured to operate like a disk drive.12