Concept - LogFile Restart

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Each copy of the restart area is 4KB in size, and has the following structure:
Offset(length)         Description
0(4)                   Magic number 'RSTR'
1E(12)                 Fixup
30(4)                  LSNa
58(4)                  LSNb
60(4)                  LSNc (==LSNa?)
6C(1)                  Volume clear flag
78(8)                  Unicode string 'NTFS'
The purpose of the various LSNs is unclear. It appears that the data around offset 3C deal with the clear/dirty state of the volume, too.
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