01-16-2013
The first partition table(s) has the correct - whatever this means - standard structure as introduced, I think, by Microsoft (?) centuries ago. Which is boot sector with partition entries, one of which points to a chain of partition tables each consisting of one entry and a link entry.
I've spent ages fiddling around with non-standard structures in extended partitions without any luck, esp. when it comes to coexistence of several OSs on the same disk.
On the other hand, linux should at least recognize the partition entries in the boot sector of your experiment. Mysterious. Not sure what the zero disk identifier does.
Did you try to use another partition tool (cfdisk, parted, sfdisk)? Did you try to read the sectors binarily (od, hexdump)?
BTW - you are fdisking sdc in your first quote and sdb in the second...
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