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DEFINITION: Cache memory is random access memory (RAM) that a computer microprocessor can access more quickly than it can access regular RAM. As the microprocessor processes data, it looks first in the cache memory and if it finds the data there (from a previous reading of data), it does not have to do the more time-consuming reading of data from larger memory. Cache memory is sometimes described in levels  … 
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MD3000 and MD3000i: Array Tuning Best Practices
sponsored by Dell, Inc.
WHITE PAPER: This white paper provides an overall approach to tuning I/O performance and also provides specific guidelines for using the storage array tuning controls.
Posted: 17 Sep 2008 | Published: 16 Sep 2008

Dell, Inc.
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CACHE DEFINITION (continued): …  of closeness and accessibility to the microprocessor. An L1 cache is on the same chip as the microprocessor. (For example, the PowerPC 601 processor has a 32 kilobyte level-1 cache built into its chip.) L2 is usually a separate static RAM (SRAM) chip. The main RAM is usually a dynamic RAM (DRAM) chip. In addition to cache memory, one can think of RAM itself as a cache of memory for hard disk storage since all of RAM's contents come from the hard disk initially when you turn your computer on and load the operating system (you are loading it into RAM) and later as you start new applications … 
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