Open Stack

Hello. 
I'm working on Liberty Openstack environment using 
ibm.storwize_svc.StorwizeSVCDriver as volume_drivert. 
When I'm creating a new volume and attaching it to the VM - by default it 
will be /dev/vdX on the instance using virtio driver. 
And this way everything is working fine.
 
But I need it to be /dev/sdX for my application needs. 
I tried to create a new type of the volume by running :
        cinder type-create SATA
        cinder type-key SATA set volume_backend_name=sata
But when I start a volume create process , it fails - the new volume has 
error state and the error in cinder-scheduler.log is :
         ERROR cinder.scheduler.flows.create_volume Failed to run task 
cinder.scheduler.flows.create_volume.ScheduleCreateVolumeTask;volume:create: 
No valid host was found. No weighed hosts available

Please advise how a volume can be attached as /dev/sdX device and not 
/dev/vdX. 
The solution of stop the VM first and only then attach a volume can also 
be taken in account. 

Thank you. 

Regards,

Alexandra Kisin
Servers & Network group, IBM R&D Labs in Israel
Unix & Virtualization Team


Phone: +972-48296172 | Mobile: +972-54-6976172 | Fax: +972-4-8296111









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