Re: [Xen-API] [Xen-users] LiveStorageMigration Error "The attempt to mark the VDI as hidden failed "

[Thanos Makatos <thanos.makatos@xxxxxxxxxx>]

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxx [mailto:xen-users-
> bounces@xxxxxxxxxxxxx] On Behalf Of Thomas Plant | Limitis
> Sent: 25 July 2013 14:34
> To: xen-users@xxxxxxxxxxxxx
> Subject: [Xen-users] LiveStorageMigration Error "The attempt to mark
> the VDI as hidden failed "
> 
> Hello.
> 
> We are moving some VMs on XCP 1.6 from an iSCSI Storage to another.
> One VM gave the following error:  The attempt to mark the VDI as hidden
> failed
> 
> But, all data has been moved to the new storage, the VM is working and
> at first sight seems ok.
> But can I trust it? Anyboday had similar errors?
> 
> Thanks
> Thomas

(That's a XenServer-specific error, dropping xen-users and CCing xen-api)

We've seen such an error before and it had to do with marking the source VDI as 
delete-able. The cause was a race condition with the GC/cleanup daemon.

If you say that the VM is running on the destination, you can check 
/var/log/SMlog and ensure that the VDI for which the error was raised is the 
VM's VDI on the source host. If this is the case everything should be OK.

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