Re: [Xen-users] Resize domU block device?

[Ralf Müller <ralf@xxxxxxxx>]

Am 19.11.2007 um 17:54 schrieb Errol Neal:

> Quoting Ralf Müller <ralf@xxxxxxxx>:
>
> > Is there a way for a domU to discover size changes of block
> > devices modified by dom0?
> The domU will be aware of the additional space.
Sure?

> How you take advantage of that is depending upon the filesystem and  
> more importantly, the OS. For example, ext3 filesystems must be  
> unmounted before you can resize them. You'll probably need to  
> delete the partition, recreate it, using up all the free space you  
> gave it. That is  , unless you use some of the other tools  
> available. I'm talking about using sfdisk, fdisk or parted..
I use lvm for the block devices in dom0 and most of them I give directly
as e.g. xvdc1 to a domU. Within domU the block device is not partitioned
anymore (except they are boot devices - but this is another story),  
but directly formated with xfs.
The day before I tested to do "lvresize -L+20G" on a logical volume
given to a domU and do a "xfs_growfs" of this volume inside the domU
it belongs to. It didn't notice that until I rebooted the domU.
Thatswhy I asked here. Is this a new feature which is not in my Xen 3.1?

Regards
Ralf

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