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[linux-lvm] problem when creating a volumegroup on an external drive



Hi,
I'm new to the list and new to the use of LVM. I have read the manuals (which mainly are for LVM1) and am using LVM2. I have one question. I just created a new volumegroup on an USB external disk. As the manual says I did : pvcreate /dev/sda but that did't work but pvcreate /dev/sda1 worked. I then did a vgcreate VG01, expecting to get one volume group for the whole disk (250 GB). However, it created 2 volumegroups, one named VolGroup00 of 46.6 GB and one VG01 (as expected) of 232.8 GB. The problem is I have on another 2 disks already a VolGroup00 so I cannot do an lvcreate VolGroup00 as this will try to access the earlier created one. Can anybody explain why an unrequested volumegroup is created and how can I solve this. I cannot do a vgdelete VolGroup00 as this will destroy my current - working - system.
Hope somebody knows the answers.
Thanks
Joep


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