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Harddrive cache - read or write?

Last response: in Storage
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July 9, 2010 6:01:12 PM


On server RAID controllers you can often specify how much of the cache that should be read and how much will be write cache. How does that work on a SATA drive with some amount of cache?

If a modern drive, say the Samsung F3, has 32 MB of cache, is it known how it is used and could it be configured if there should be a need?

July 9, 2010 6:12:54 PM

It is typically used for writes and you can not change how the disk cache is used.
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July 9, 2010 6:25:25 PM


Thank you for your reply.

Hovaucf said:
It is typically used for writes and you can not change how the disk cache is used.


With typical, do you mean that it is made that way by the harddisk manufacturer, or that it is most used that way in practical work?
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July 9, 2010 7:24:58 PM

Hovaucf said:
It is typically used for writes and you can not change how the disk cache is used.

That's not quite true. It's typically used for both read and write caching, and you can change how it is used in the windows device settings. Generally, they do not design them to use a fixed quantity for reads and a fixed quantity for writes - instead, it dynamically changes how much is used for each to work best with whatever you are trying to do at the time.
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July 10, 2010 11:53:40 AM

cjl said:
It's typically used for both read and write caching, and you can change how it is used in the windows device settings.


How do you change this on the device driver? Through Windows Device Manager or some 3-part utility?
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July 13, 2010 3:03:30 PM


Anyone who has any idea of this? I seems to have got two different views here?
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