Re: [linux-lvm] Disk Partitioning tools, GUI preferably- best for LVM Logical Volume Management ; jor

["Bryn M. Reeves" <bmr@redhat.com>]

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On 07/26/2010 01:16 PM, Stuart D. Gathman wrote:
> On Mon, 26 Jul 2010, Bryn M. Reeves wrote:
> 
>> On 07/24/2010 04:28 AM, giovanni_re wrote:
>>> So, I've got that big LV 4th partition, with empty space (2TB drive),
>>> and now I want to create some more linux partitions so I can install
>>> some other distros.
>>
>> If you want VMs then partitioning an LV makes sense. You present the
>> entire LV as a virtual disk to the guest and the emulated devices appear
>> to that OS as a regular partitioned disk. This is a very common technique.
> 
> Using Xen modified OSes, you don't need to partition the LVs.  The 
> xen storage driver presents each mapped block device as a virtual
> partition.

Not used Xen for a long time but that's good to know - iirc it did not
behave like this the last time I used it (with xvda disks).

> Booting multiple LVM supporting OSes works fine with LVM.  Have a LV for the
> root filesystem of each Linux OS, and have them all on the Grub menu.
> Make the /boot partition extra large.  I do this with every laptop
> and desktop as SOP.  Make Fedora upgrades much less fearful.

That's exactly what I was suggesting :-)

Adding nested partitions _inside_ the LVs (which is what the OP seemed
to want) is going to complicate things significantly for bare-metal.

> If every distro sticks to reasonable naming conventions in /boot (so
> that they don't step on each others kernels), then it all works fine.

Yes although you still need to be a little careful during installations
to make sure that there aren't any conflicts (I often want to have a
couple of versions of the same distribution, or even different instances
of the same version of the same distribution installed together). Also
remember never to re-format /boot during an install :)

Regards,
Bryn.



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