LVM creation methods

[Muhammad Yousuf Khan <sirtcp@gmail.com>]

i was reading a document where a person has configured physical volume
and didn't use fdisk
  he just directly created the partition by "pvcreate /dev/sda"

and there are some documents which shows the utilization of fdisk and
converting sda1 to "8e" type  which is LVM.

so the question is what is the difference b/w creating it directly on
disk by pvcreate command and by using fdisk.

actually i have just created the partition via direct command
"pvcreate /dev/sda"  it is fully functionally and i can use it as a
partition but when i fdisk -l /dev/sda  it shows that the disk is
empty. so i am worried that is it the proper way to do it or else i
may not end up with consequences.


Thanks,