Determining Free Space

[omikron48]

Hello again.

I'm trying to make a new script now.

How do I go about determining my drive's free space in bytes?

DriveSpaceFree only returns free space in MBs with a float. Is it reliably accurate when you use that return value and just multiply it to 2^20? I did a few tests and it seems ok but I'm just worrying if it's not perfect all the time.

Global Const $drive = StringLeft(@ScriptDir, 3)
Global $free = DriveSpaceFree($drive) * 1024 * 1024
MsgBox(0, "Drive Free Space For " & $drive, $free)

[nekkutta]

well, that's how I do it, and just to be sure I usually subtract about 25 to the DriveSpaceFree() before the *1024*1024 ie. "(DriveSpaceFree() - 25) * 1024 * 1024" but that is mainly when I am copying to a usb flash drive just to make sure that I don't overload the thing >_

[omikron48]

There are times when my $free calculation is different from the actual number when I view it in my flash drive's properties.

In any case, I just modified my algorithm to not rely on finding out the actual free space of my drive. It now works like a charm.

I was trying to make a dummy file generator that will populate my flash drive so viruses can't copy into it when I plug it into infected computers.

[Authenticity]

#include <String.au3>

Global $oWMI = ObjGet('winmgmts:\\.\root\CIMV2')
Global $oDrives = $oWMI.ExecQuery('SELECT * FROM Win32_LogicalDisk WHERE DeviceID="' & @HomeDrive & '"')

For $oDrive In $oDrives
    ConsoleWrite(_StringAddThousandsSep($oDrive.FreeSpace) & ' bytes.' & @CRLF)
Next

[Yashied]

Try this.

$tData = DllStructCreate('int64')
DllCall('kernel32.dll', 'int', 'GetDiskFreeSpaceEx', 'str', @HomeDrive, 'ptr', DllStructGetPtr($tData), 'ptr', 0, 'ptr', 0)
ConsoleWrite('Free space on ' & @HomeDrive & ' => ' & DllStructGetData($tData, 1) & ' bytes' & @CR)