Getting LogicalDriveInformation of different hard disks.....

[learningvisualc]

Hi all, If i have more then one hard disk in my system then how can i get its logical drive information in a format like Hard disk first then C:/,D:/...Then Hard disk2 E:/,F:/... GetLogicalDrive() function retrieves all the Logical drives. How can i do this??? Thanks in advance...

[Lost User]

GetLogicalDrives returns an integer where each bit represents a drive letter which is either present (1) or not (0). The least significant bit means A: and then each next bit is one letter up. So in order to check for the presence of drive C:, you'd test the 3rd bit:

if(GetLogicalDrives() & 4)
	printf("Drive C: is present.");

The number 4 to AND with is represented as 00000000000000000000000000000100 in binary, so in effect you check if the 3rd bit is set. You can use GetDriveType[^] to determine if a drive is a hard disk or something else, like a CD-ROM or network drive.

[Luc Pattyn]

I know of three ways: 1. There are a number of Win32 functions for this in kernel32.dll; they include GetDriveType, GetVolumeInformation, GetDiskFreeSpaceEx, and maybe more. 2. reading some keys in the registry. This is not recommended, and may trigger a UAC dialog, or fail, for non-admin accounts under Vista/Win7. 3. the WMI classes provide a lot of information (e.g. Win32_DiskDrive, Win32_LogicalDiskToPartition, Win32_PhysicalMedia, Win32_CDROMDrive). WMI works like a database, and it allows to query for other systems on the network. :)

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[David Crow]

learningvisualc wrote:

How can i do this???

Are you wanting to know what logical drives belong to each physical drive? If so, see here. It's VB, but can easily be converted.

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