Re: single RAID slower than aggregate multi-RAID?

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Justin Piszcz wrote:

Because you are using port-multipliers, they do not allocate full bandwidth to each HDD simultaneously. You will get a maximum of 3gbps per each port, but if you are reading from 12 ports into a single 3gbps port?

Jan's setup is 3 drives on each port multiplier, which are each attached to a port on the controller, so should be just on the limit of the 3Gb/s link between controller and multiplier.

According to this, with the same controller and 12 portmultiplied Seagate drives on a Mac, in one single RAID 0, you should see just under 700MB/s peak, so there may be room for improvement yet.

http://www.amug.org/amug-web/html/amug/reviews/articles/addonics/adsa3gpx8-4em/

Regards,

Richard
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