How to Generate File of a determinate Size in Windows?

问题

How is the Best and fastest way to do it?

回答1:

PowerShell:

$f = new-object System.IO.FileStream c:\temp\test.dat, Create, ReadWrite
$f.SetLength(42MB)
$f.Close()

This will create a file c:\temp\test.dat that consists of 42MB of nullbytes. You can of course just give byte count instead as well. (42MB = 42 * 1048576 for PowerShell)

回答2:

I found this Page, I try it and work great.

To create a single File use

fsutil file createnew filename filesize

To create a lot of Files use

For /L %i in (1,1,25000) do fsutil file createnew A%i.tmp 12288

will create 25,000 files of 12288 bytes (12KB) named A1.tmp, A2.tmp, A3,tmp…

回答3:

c:\>fsutil file createnew /?
Usage : fsutil file createnew <filename> <length>
   Eg : fsutil file createnew C:\testfile.txt 1000

来源：https://stackoverflow.com/questions/808005/how-to-generate-file-of-a-determinate-size-in-windows