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Re: [linux-lvm] Backup of ROOT Partition.



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Jean-Philippe Villeneuve wrote:
> I get the folowing error:
> 
> Insufficient free extents (1) in volume group VolGroup00: 19 required
> 
> It works find if I do it with -L20M.

You need to either grow the physical volume if possible, add extra
physical volumes to the volume group (and therefore grow the volume
group), or shrink the existing logical volume.

> according to 'df' I have plenty of space for data.

Yeah, but that's not the space that logical volumes use.

LVs are allocated from inside the group-of-physical-volumes in a VG.
Think of LVs like partitions: if you have tons of space available on the
FS that's inside a partition, that doesn't necessarily mean you can add
a new partition to the disk.  You'll have to either shrink the existing
LV, or add more physical volumes to the group.

I believe either can be done while the FS is mounted.
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