Go deep into Windows 7 virtual hard disk (vhd) Technology

(This articleArticlePut it here, saving you the need to go to Baidu every time, hum)

Getting started with vhd:

Http://blogs.technet.com/ B /fyu/archive/2009/01/21/windows-7-virtual-hard-disk-vhd.aspx

Http://blogs.technet.com/ B /fyu/archive/2009/01/19/windows-7-vhd.aspx

Http://blogs.technet.com/ B /fyu/archive/2009/01/19/vhd.aspx

The vhd performance is inferior to that of the physical hard disk when sequential writing is mentioned in this article. It is assumed that the sequential Writing of vhd files to the physical disk is not necessarily in the complete order, head movement costs higher than physical disks. Another interesting phenomenon is that when you directly read a vhd bare disk, if there is no data in the vhd, these read requests will not actually fall into the physical hard disk, resulting in sequential iops, BW and other indicators are abnormal, but they are actually full of clouds.

Vhd specifications for MS

Http://technet.microsoft.com/en-us/virtualization/bb545897.aspx

Http://download.microsoft.com/download/f/f/e/ffef50a5-07dd-4cf8-aaa3-442c0673a029/Virtual%20Hard%20Disk%20Format%20Spec_10_18_06.doc

Another Ms article on vhd

Http://blogs.technet.com/ B /ranjanajain/archive/2010/03/23/virtual-hard-disk-vhd-architecture-explained.aspx