[CentOS] how to resize a partition of a disk define as a physical volume

Bernard Fay bernard.fay at gmail.com
Wed Feb 22 14:05:38 UTC 2017


I usually use the whole disk a PV but this disk has the /boot partition
which cannot be LVM.

I decided to simply use the third partition as another PV and extended the
VG.

Thanks,



On Wed, Feb 22, 2017 at 8:52 AM, Gianluca Cecchi <gianluca.cecchi at gmail.com>
wrote:

> On Wed, Feb 22, 2017 at 2:42 PM, Bernard Fay <bernard.fay at gmail.com>
> wrote:
>
> > How do you resize the partition without loosing data?
> >
> > gparted does not support LVM.
> >
> >
> It is preferrable to create PV on the whole disk also to manage these kind
> of situations.
> In case I have to manage with partitions, the must is that you can do it
> only if it is the last partition, and you are ok.
> Normally I use fidsk and I first delete the last partition and then without
> exiting the utility I create again it using the same starting point and the
> new larger end.
> For this, take care of using option to show sectors and not cylinders ("u"
> switches between the two options) and print your partition layout ("p"
> comamnd), so that you can set exactly the same starting point of the new
> xvda2 partition otherwise you will have destroyed it and LVM layer would
> not be able to identify it (also the type if now it is 8e for Linux LVM).
> Eventually you will have to run also the command
>
> partprobe /dev/xvda
>
> to align os with new partition layout
>
> Take care and read well (also on other sources on internet in case). Also
> backup your partiion layout before making changes with
>
> sfdisk -d /dev/xvda > part_table.before
>
> and compare with what you have after.
>
> HIH,
> Gianluca
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