在测试硬盘的时候需要用到大文件测试速度

fsutil file createnew [文件名字] [文件大小(以字节为单位)]

1G = 1073741824

5G = 5368709120

10G = 10737418240

20G = 21474836480

50G = 53687091200

100G = 107374182400

200G = 214748364800

500G = 536870912000

1T = 1099511627776

2T = 2199023255552

5T = 5497558138880

8T = 8796093022208