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09-07-2011

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Linux LVM Question

I've three partitions on /dev/sda: sda1, sda2 sda3. There is FREE space between sda2 and sda3 and sda3 ends on the last sector. sda2 and sda3 have the same number of sectors allocated and so are the exact same size.

/dev/sda2 is already part of the VG VolGroup. However, what puzzles me is that if I do "lvm vgextend /dev/sda3" and check with "lvm pvdisplay", the PV Size for /dev/sda3 is listed as 754.07GiB whereas the PV for /dev/sda2 is listed as 187GiB. I expected /dev/sda3 to be listed as 187GiB. Did the system include the FREE space as well in the vgextend? I'm not able to derive 754.07GiB.

If it included the free space as well, if I did:

"lvm pvmove /dev/sda2 /dev/sda3"

will it move the PV (VG's and LV's) to the start of the FREE region or to the start of /dev/sda3? I expect to the start of the partition /dev/sda3 though I have a doubt based on the actual size repoted for VolGroup on /dev/sda3

Thank You,

Devyn

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