User`s guide

write-back cache
A cache in which copies are kept of any data in the region. Read and write
operations may use the copies, and write operations use additional states to
determine whether there are other copies to invalidate or update.
write-through cache
A cache in which copies are kept of any data in the region. Read operations
may use the copies, but write operations update the actual data location and
either update or invalidate all copies.
Glossary–5