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Re: Adding LVM to an existing system



Dick Davies wrote:
On 15/11/05, Marc Shapiro <mshapiro_42@yahoo.com> wrote:

I currently do not use LVM.

I have a 40GB disk with 3 physical partitions and logical partitions
5-11 on the remaining physical partition.  Several of the partitions are
getting full.  There is space on the disk.  Just over half of the disk
space is UN-partitioned.

What I need to know is if I am better off to simply juggle the data
around using parted to increase the size of the paritions, or should I
install LVM and migrate the data to LVM volumes.


I'd go for the latter - LVM is much saner than mucking about with parted and
symlinks. If you want the flexibility of multiple partitions without
the 'I guessed wrong
when I installed and now /usr is 5% full but /home is bursting'
hassle, it's the only
sensible choice.


Is this a good plan, or should I just juggle logical paritions and not
use LVM?

Good plan.  Once you convert your old partitions to PVs you could even empty
out the temporary PV you created on the end of the disk (using pvmove)
if you need
the space for something else.

One thing that I have yet to see a conclusive answer to: Can I make LVM Logical Volumes from logical partitions in an extended physical volume. Since I have 4 physical volumes, including an extended volume, I would have to create the LVs from logical partitions.

Also, assuming that I can use logical partitions, is it possible to use some, but not all logical partitions from an extended partition. Currently, my / partition is /dev/hda5 and my /boot partition is /dev/hda11 and I would want these to NOT be included in the LV. I would be including /dev/hda6 through /dev/hda10 as well as a new /dev/hda12 (which will be the remaining space on the disk).

Will this work?

--
Marc Shapiro
mshapiro_42@yahoo.com



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