Are Reparse Points and MountVol broken when seen by WinPE or Linux ?

MountVol shows :-

Code:

    \\?\Volume{7374db70-7389-11e2-8a06-001e8c888f33}\
        I:\
        E:\Images\

When I look at E:\Images I see the contents of
I:\ = \\?\Volume{7374db70-7389-11e2-8a06-001e8c888f33}\

If I use a Bootable WinPE or Linux CD the drive letters will be different or non-existent.
What about the GUID {7374db70-7389-11e2-8a06-001e8c888f33}
Is that fixed in the partition table or is that another figment of Windows imagination ?

Do reparse points maintain their links between separate partitions and separate HDD's :-
regardless of whether created by MounVol or MKDIR or tools such as
Junction Link Magic
and regardless of any changes in drive letters as seen by different operating systems ?

Regards
Alan

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