HP D5970A - NetServer - LCII Configuration Manual page 135

Glossary
memory read. Write-back is efficient, because an entry may be written
many times in the cache without a disk access.
Write Through: In a write-through cache, data is written to disk at the
same time as it is cached. Write-through is simpler than write-back,
because an entry that is to be replaced can be overwritten in the cache, as
it will already have been copied to disk.
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