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<H1>[Mageia-dev] time to switch from raw partitions to lvm?</H1>
<B>andre999</B>
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TITLE="[Mageia-dev] time to switch from raw partitions to lvm?">andr55 at laposte.net
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<I>Sat Feb 26 06:12:09 CET 2011</I>
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<PRE>Frank Griffin a écrit :
><i>
</I>><i> Wolfgang Bornath wrote:
</I>>><i> Now with LVM, what do I do?
</I>>><i>
</I>><i> Pretty much exactly the same, if that's what you want. LVM is just a
</I>><i> layer of indirection that you place on top of *only* those partitions
</I>><i> you want LVM to control. It lets you create multiple "virtual"
</I>><i> partitions each of which includes one or more physical partitions. In
</I>><i> the minimal case, you can partition exactly as you would without LVM,
</I>><i> but make each of the Mageia partitions an LV formatted as ext4 (or
</I>><i> whatever) rather than a physical ext4.
</I>><i>
</I>><i> The difference is that later on if you need to expand one of these 1-1
</I>><i> LVM partitions, all you do is create another physical partition
</I>><i> *somewhere* - either on that physical disk or another you add - and tell
</I>><i> LVM to make that new physical partition part of the LV you want to
</I>><i> expand. The original physical partition on which you based the LVM
</I>><i> stays exactly where it is without change, and the Logical Volume just
</I>><i> magically increases in size by the size of the new physical partition
</I>><i> you added.
</I>><i>
</I>><i> Using LVM for some or all of Mageia has no effect on your ability to use
</I>><i> standard partitioning for other partitions on these disks.
</I>
It occurs to me that LVM (which I have only tested a long time ago)
would play nicely on a large disk with a gpt partition table.
Just divide the disk into a lot of reasonably-sized partitions (the
limit for a default gpt table is 128 (primary) partitions, and let LVM
combine them as appropriate, being dynamically reassociable as needed.
Then if you want to do a clean install of a new Mageia (or other)
release, could you just reformat the partitions you want (excluding
/home and whatever other partitions you want to keep), without problem
with LVM ?
If so, that would be nice.
The trick of course would be to ensure that you assign directories to
partitions in an appropriate manner.
some random thoughts ... :)
--
André
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