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090604 Maxim Wexler wrote: |
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> why give the logical volumes any size at all ? |
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> If they can be expanded at will, |
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> why not just the let the files fill them up as much as they need ? |
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That's not how it works: you need to create the LVs with enough space |
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for your likely needs & LVM then assigns them in its own way to the PVs; |
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later, if you made an LV too small, you can increase it |
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(you also have to extend the file system after you've done that, |
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but of couse don't simply reformat the whole LV); |
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if you want to decrease an LV -- rather unlikely in real life -- , |
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the problem is that you may risk losing data, if that part is dropped: |
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I would imagine the correct procedure is to copy everything somewhere |
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-- another LV, another partition, a USB stick -- , |
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then delete the LV & recreate it with the smaller size. |
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When I set up LVM in my newly-built machine in Nov 2007 , |
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I tried to estimate what each LV would need based on experience. |
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Recently, I added a whole new LV & extended another, |
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but otherwise LVM has worked flawlessly (even SystemRescue recognises it). |
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-- |
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========================,,============================================ |
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SUPPORT ___________//___, Philip Webb |
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ELECTRIC /] [] [] [] [] []| Cities Centre, University of Toronto |
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TRANSIT `-O----------O---' purslowatchassdotutorontodotca |
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