Cache-the size of the different brands and different types of products are different, early hard drive cache are very small, only hundreds of KB, and has been unable to meet the needs of users. Used by the 2MB and 8MB is now mainstream hard disk cache, and on servers or in special applications there are cache-bigger products, even up to 16MB, 64MB, and so on.
Read and write caching while the hard disk capacity under operating conditions, so that more data is stored in the cache, to speed up access to hard disks, but does not mean larger caches are more superior. Cache algorithm of application there is a problem, even if the cache capacity is large without an efficient algorithm, it will cause the application data in the cache hit rate is low and cannot effectively play the advantages of large-capacity buffer. Complementary algorithm and cache capacity, large-capacity cache requires a more efficient algorithm, otherwise performance will be greatly discounted from a technical standpoint, high capacity cache algorithms are important factors that directly affects the performance of your hard disk to play. A larger capacity hard disk cache is the future development trend.