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I know pvcreate a LVM physical volume usually on a LVM partition, but I do a pvcreate on a empty ext3 partition accidentally, is this dangerous, do I really need to repartition with LVM format on the target disk?

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It should be fine. I'm pretty sure the "format" you would select in fdisk is really nothing more than a label.

With that said, changing a partition type is an easy process. You only need to use fdisk's 't' command. The type for LVM is '8e'.

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  • Some OSes care about partition types, but Linux doesn't (it only looks for signatures inside the partitions) except for extended partitions (i.e. containers for logical partitions). Apr 4, 2011 at 20:40

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