[Mageia-dev] time to switch from raw partitions to lvm?

Sat Feb 26 06:12:09 CET 2011

Frank Griffin a écrit :
+>
+> Wolfgang Bornath wrote:
+>> Now with LVM, what do I do?
+>>
+> Pretty much exactly the same, if that's what you want.  LVM is just a
+> layer of indirection that you place on top of *only* those partitions
+> you want LVM to control.  It lets you create multiple "virtual"
+> partitions each of which includes one or more physical partitions.  In
+> the minimal case, you can partition exactly as you would without LVM,
+> but make each of the Mageia partitions an LV formatted as ext4 (or
+> whatever) rather than a physical ext4.
+>
+> The difference is that later on if you need to expand one of these 1-1
+> LVM partitions, all you do is create another physical partition
+> *somewhere* - either on that physical disk or another you add - and tell
+> LVM to make that new physical partition part of the LV you want to
+> expand.  The original physical partition on which you based the LVM
+> stays exactly where it is without change, and the Logical Volume just
+> magically increases in size by the size of the new physical partition
+> you added.
+>
+> Using LVM for some or all of Mageia has no effect on your ability to use
+> standard partitioning for other partitions on these disks.
+
+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
+