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I have 3 RAID arrays in my server, mapped to 2 PVs in my lvm2 setup.

apollo:~# pvs
  PV         VG      Fmt  Attr PSize PFree
  /dev/sda1  apollo  lvm2 a-   3.64T    0 
  /dev/sda2  apollo  lvm2 a-   1.14T    0 
  /dev/sdb   apollo1 lvm2 a-   2.05T    0 
apollo:~# lvs
  LV        VG      Attr   LSize   Origin Snap%  Move Log Copy% 
  lvol0     apollo  -wi-ao   4.77T                              
  ling-ling apollo1 -wi-ao 895.41G                              
  lvol0     apollo1 -wi-ao   1.17T                              
  lvol1     apollo1 -wi-a-  32.00M                              

I want to remove the LV "ling-ling" to free up some space, however I want to expand lvol0 with that free space, which is residing on the other VG.

Is there a way in LVM to allocate a percentage of a PV to different VGs without repartitioning? The only solution I can think of is to repartition /dev/sdb but I would prefer not to, since this is a live server.

Thanks :)

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2 Answers 2

up vote 1 down vote accepted

No. VGs consume PVs whole.

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As I thought. Ah well. –  bobinabottle Aug 9 '10 at 6:27

If you want to split a drive/LUN between VGs, you'd have to create two partitions and a PV on each. This has a number of drawbacks, not least of which is that you'd need to destroy the PVs and repartition to change the layout!

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