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Operating Systems BSD OpenBSD fdisk - Linux fdisk compatibility ? Post 302756613 by RudiC on Wednesday 16th of January 2013 07:25:35 AM
Old 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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PARTX(8)						      System Manager's Manual							  PARTX(8)

NAME
partx - telling the kernel about presence and numbering of on-disk partitions. SYNOPSIS
partx [-a|-d|-l] [--type TYPE] [--nr M-N] [partition] disk DESCRIPTION
Given a block device ( disk ) and a partition table type , try to parse the partition table, and list the contents. Optionally add or remove partitions. This is not an fdisk - adding and removing partitions is not a change of the disk, but just telling the kernel about presence and numbering of on-disk partitions. OPTIONS
-a add specified partitions or read disk and add all partitions -d delete specified or all partitions -l list partitions. Note that the all numbers are in 512-byte sectors. --type TYPE Specify the partition type -- dos, bsd, solaris, unixware or gpt. --nr M-N Specify the range of partitions (e.g --nr 2-4). SEE ALSO
addpart(8), delpart(8), fdisk(8), parted(8), partprobe(8) AVAILABILITY
The partx command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/. 11 Jan 2007 PARTX(8)
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