Definitions for "Write-back cache"
A performance caching technique in which the completion of a write request is signaled as soon as the data is in cache; Actual writing to the disk occurs at a later time. Since the operating system is "fooled" into thinking that the write has actually been written to disk, there is a risk of losing or corrupting data in cache should an error or power failure occur. Therefore, use of a battery-backed cache is recommended to prevent such data loss/ corruption.
(n.) See write-in cache.
locations in cache memory are grouped together in blocks and when it is necessary to update main memory to reflect changes in the cache, the entire block of main memory is updated rather than just individual locations. [SILC99][TOP OF THE PAGE] [TOP OF THE PAGE] [TOP OF THE PAGE