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Zitat von
http://www.windows-server-answers.com/microsoft/Windows-Server-SBS/32892917/determin-drive-letter-using-deviceharddiskvolume.aspx:
Typically, \Device\HarddiskVolume2 indicates the second partition on a
basic disk. You can verify the drive letter in the Computer
Management--->Disk Management. The second volume of that disk is the
HarddiskVolume2 (from left to right).