Logical partitions point to drives other than \Device\Harddiskx\Partition0.

They are initially assigned names with drive letters (\\.\drive_letter:) and typically re-assigned symbolic link names (\\.\symbolic link name). For example, \\.\D: may be assigned a symbolic link name of \\.\ACCOUNTING_1. Regardless of whether a drive letter or symbolic link name is used, logical partitions are defined to represent a specific partition in a disk rather than the entire disk. Internally, these names can expand to:

\\.\D:= \Device\Harddisk2\Partition1 
\\.\ACCOUNTING_1= \Device\Harddisk3\Partition2