On Fri, 2015-06-12 at 18:11 +0800, Tom Yan wrote: > Thank you for you reply. I thought of the same thing as you've told, > but because I don't really know how SSD/SATA works internally, so I > was also thinking if "raid0" on the same drive might works as > something like "Hyper-Threading" in CPU. Modern SSD controllers are already effectively doing "RAID0" striping over multiple individual flash chips inside the drive in order to achieve maximum sequential write speeds. With high end drives, a single sequential write can already saturate the available bandwidth on the SATA wire. If anything, splitting up writes to bounce back and forth between two different regions of the same drive would add overhead, and might disrupt the write optimizations in the drive controller. It would probably end up slower - although the difference might not be noticable If you're just looking for speed, stick to single mode and let the drive go fast. Calvin. -- Calvin Walton <calvin.walton@xxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
