Re: [Xen-users] Changing the size of an exported block device

[Kris Buytaert <mlkb@xxxxxxxxx>]

On Thu, 2006-01-26 at 14:34 +0000, Andy Smith wrote:
> Hello,
> 
> Say I have an LVM LV exported to a running domU, and I want to
> increase the size of that LV.  I can lvextend from dom0, and I can
> use whatever filesystem tools I like to extend that fs in dom0 if I
> were to mount it.
> 
> However I understand that if the domU were to try to write beyond
> the end of the block device's limits as it knew when it was exported
> then it will get very upset.
> 
> What is the correct procedure in this circumstance?  Is it possible
> to withdraw the block device from the domU and then export it again
> so that it sees it as new?
> 

Assuming that is not your root filesystem you want to withraw from a
domU 
The commmands below should solve your problem.

Virtual Device Commands:
block-attach <DomId> <BackDev> <FrontDev> <Mode>
                [BackDomId]         Create a new virtual block device
   block-detach  <DomId> <DevId>    Destroy a domain's virtual block
device,
                                    where <DevId> may either be the
device ID
                                    or the device name as mounted in the
guest
   block-list <DomId>               List virtual block devices for a
domain

> Thanks,
> Andy
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> http://lists.xensource.com/xen-users
-- 
Kris Buytaert <mlkb@xxxxxxxxx>

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