[Mageia-discuss] partitioning bug

[Pascal Terjan]

On Fri, Jul 6, 2012 at 8:37 AM, blind Pete <0123peter at gmail.com> wrote:
> David W. Hodgins wrote:
>
>> On Thu, 05 Jul 2012 05:10:30 -0400, blind Pete
>> <0123peter at gmail.com> wrote:
>>
>>> Cfdisk is very unhappy about something.
>>>
>>>     FATAL ERROR: Bad primary partition 3: Partition begins after
>>>     end-of-disk Press any key to exit cfdisk
>>>
>>> It looks like cfdisk's error message is wrong.  Partition 3 is mounted
>>> and in use.
>>
>>> Disk /dev/sda: 121601 cylinders, 255 heads, 63 sectors/track
>>> Warning: extended partition does not start at a cylinder boundary.
>>> DOS and Linux will interpret the contents differently.
>>> Units = sectors of 512 bytes, counting from 0
>> 121601x255x63=1953520065
>
> CHS has not been reliable since zones were introduced decades ago.
> They are just a general hint that it is a big drive.  LBA or
> sector number is all that matters.  What happens inside the HDD
> case is an unknowable mystery.

But cfdisk is still based on CHS (or was few years ago).
For example https://bugzilla.redhat.com/show_bug.cgi?id=630340#c1 says
that 2.18 (the one in mageia 1) expected the size of the device to be
a multiple of the cylinder size.

> Even if partition four were past the end of the disk it would not
> excuse cfdisk for complaining about partition three.

Yes I don't know why it complains about 3 and not 4