Alan Freedman -- The Computer Language Company - Computer Desktop Encyclopedia
Computer Desktop Encyclopedia
Longest-Running Tech Reference on the Planet

A CDE Definition

You'll love The Computer Desktop Encyclopedia (CDE) for Tech Term of the Day (TTOD)


write-back cache

A disk or memory cache that supports writing. Data normally written to memory or to disk by the CPU is first written into the cache. During idle machine cycles, the data are written from the cache memory to main memory or to disk. Write-back caches improve performance, because writing to the cache is faster than writing to main memory or disk.

Disk Writes
A disk write-back cache does add a slight amount of risk, because the data remain in volatile memory longer. When the computer is turned off, the operating system ensures that the data written to the cache are saved before powering down. See write-through cache and cache.

Personal Use Only

Before/After Your Search Term
WRAMwrite blocker
WRANwrite cycle
wrap plugwrite error
wrapperwrite once
wrist restwrite once CD
wrist strapwrite once-read many
wrist supportwrite once-run anywhere
writable DVDwrite only code
writewrite precompensation
write accesswrite protect

Terms By Topic
Click any of the following categories for a list of fundamental terms.
Computer Words You Gotta KnowSystem design
Job categoriesUnix/Linux
Interesting stuffPersonal computers
InternetIndustrial Automation/Process Control
Communications & networkingAssociations/Standards organizations
HistoryDesktop publishing
ProgrammingHealthcare IT
System design