[linux-lvm] pvcreate -- extended partition "/dev/hda10" doesn't exist

[Udo Weber <udo weber mainz ibm de>]

Hi LVM-specialists,

I'm new here the Linux-LVM-array. This means I was downloading all
needed software+patches, compiled successfull and also installed without
erors on my IBM-Thinkpad (300 MHz PII, 128 MB RAM, 8GByte HD).
I have all my LINUX-stuff on several extended partitions.

Now at first some generally questions (I don't  found an answer for this
in the docu):
Is it possible to create a PV on a extended partion or do I need only
primary partions ?
I think pvcreate writes something at the top of the physical volume (
whole PV or partion).
Do that works well with other OS-formated parts of the same hdisk ?

If the first question is no, forget the rest of this mail!
If it should works please help. Here are all infos related to my
problem:

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Welcome to SuSE Linux 6.1 (i386) - Kernel 2.2.10 (tty4).