a quick google turns up Win32::DriveInfo.

You can use sniff for determining if you need to use it (or a *nix counterpart like you're trying to use) or not. Re: cross platform scripts has a very rudimentary version of it demonstrated.

In reply to Re: get disk usage details like free, used, available for windows drives with sizes in TB by jellisii2
in thread get disk usage details like free, used, available for windows drives with sizes in TB by balakrishnan

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