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Did you follow steps similar to [1], if yes you should be able to see the
backends listed as types in horizon dashboard, just select type while you
create and you can create volumes specifying volume type in cinder create
CLI.

k$ cinder help create
usage: cinder create [--snapshot-id <snapshot-id>]
                     [--source-volid <source-volid>] [--image-id <image-id>]
                     [--display-name <display-name>]
                     [--display-description <display-description>]
                     [--volume-type <volume-type>]
                     [--availability-zone <availability-zone>]
                     [--metadata [<key=value> [<key=value> ...]]]
                     <size>

Add a new volume.

Positional arguments:
  <size>                Size of volume in GB

Optional arguments:
  --snapshot-id <snapshot-id>
                        Create volume from snapshot id (Optional,
                        Default=None)
  --source-volid <source-volid>
                        Create volume from volume id (Optional,
Default=None)
  --image-id <image-id>
                        Create volume from image id (Optional, Default=None)
  --display-name <display-name>
                        Volume name (Optional, Default=None)
  --display-description <display-description>
                        Volume description (Optional, Default=None)
  *--volume-type <volume-type>*
*                        Volume type (Optional, Default=None)*
  --availability-zone <availability-zone>
                        Availability zone for volume (Optional,
Default=None)
  --metadata [<key=value> [<key=value> ...]]
                        Metadata key=value pairs (Optional, Default=None)


Also verify the volume types created with *cinder type-list*


[1] http://docs.openstack.org/admin-guide-cloud/content//multi_backend.html

Best Regards,
Swapnil Kulkarni
irc : coolsvap
*"It's better to SHARE"*


On Wed, Feb 26, 2014 at 7:35 PM, Fiorenza Meini <fmeini at esseweb.eu> wrote:

> Hi there,
> I'd like to have cinder working with two storage: NAS and local disk, so
> that I can choose in Dashboard (or command line) where to create the volume.
> First I configured the mount of NAS device through NFS driver, and it
> worked fine. Then I tried the multi backend option of cinder, but I cannot
> see the local volume...
>
> Any suggestion, please?
>
> Regards
> Fiorenza
> --
>
> Fiorenza Meini
> Spazio Web S.r.l.
>
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