SAN School Quiz 3 Answer # 10

Question #10

Snapshot copies use a technology known as:

a. Instant image
b. Primary image
c. Echo
d. Copy on write

Were you correct? The correct answer is
d. Copy on write

Learn more:

Copy-on-write is a technology that allows for point-in-time copy that only writes modified blocks of data to a backup target. This approach creates efficiency in backup by requiring the user to back up a smaller percentage of data -- because it's only writing data that has been changed since the last snapshot was taken.

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This was first published in January 2004

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