Improve performance by modifying the location of VHD files

Yesterday with a VHD installed a win 10 preview version experience, feel the disk operation is very slow, and then tested with HD tune, found that the speed of only half of the physical hard disk.

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This is a big surprise, because of the convenience of the VHD, I often take it in the company to install multi-system, there is no very obvious slow feeling. I searched the internet and found an article. The performance loss of the VHD partition is much higher than the legendary 10%. There are high-skilled to explain: mechanical hard disk in front of the partition fast, behind the partition is slow, that is, hdtune that drop curve. Because the hard disk has the inner and outer rings respectively. To be faster, put the VHD in the front partition as much as possible. Where the Hdtune curve begins .

I moved the VHD file to the first partition, which was pretty obvious:

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Write speed and physical hard disk a bit of a gap, and the reading speed is basically not the same as the physical hard disk, and then use this VHD to hang the win 10 try a bit, speed on the up. It seems that the VHD file and location are still very much related, you need to be aware of the operating system with VHDs.

In addition, the article also said that the VHD on the SSD is no difference, because my SSD is only 64G, there is not enough space to experiment, theoretically speaking should be correct. Look, the current SSD price is much cheaper than before, 128g of about 350 can buy, with it to hang one or two VHDs or a good choice. But it's still not big enough, and when 256G drops to about 350, it's cool to hang a VHD on an SSD.

Improve performance by modifying the location of VHD files