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Hard Drive Caches & Streaming Data

post #1 of 2
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I understand that like all caches, hard drive caches work best for data that will fit wholly in the cache. However, how do they behave in the case of streaming data, like capturing video?

Is there an advantage to having drives with larger caches, in this scenario? When cached data is committed to the platters, is it done so in a streaming fashion - i.e. like a pipe - or is the entire cache flushed once it is full?
Edited by parityboy - 6/1/11 at 9:03am
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post #2 of 2
When streaming data a larger cache will not give you any benefit on a modern hard drive. The cache is primarily used to access data that you have access previously, more quickly. When streaming data constantly, once the drive reaches its sustained write speed the cache offers no advantage.
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