root@cloud:~# apt-get install -s -f -y cinder-volume
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 cinder-volume : Depends: tgt but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
root@cloud:~# apt-get install -s -f -y tgt
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 tgt : Depends: librdmacm1 (>= 1.0.15) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
root@cloud:~# apt-get install -s -f -y librdmacm1
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  libibverbs1
The following NEW packages will be installed:
  libibverbs1 librdmacm1
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Inst libibverbs1 (1.1.5-1ubuntu1 Ubuntu:12.04/precise [amd64])
Inst librdmacm1 (1.0.14.1-2 Ubuntu:12.04/precise [amd64])
Conf libibverbs1 (1.1.5-1ubuntu1 Ubuntu:12.04/precise [amd64])
Conf librdmacm1 (1.0.14.1-2 Ubuntu:12.04/precise [amd64])
root@cloud:~#