Version-Release number of selected component:
system-storage-manager-0.2-1.fc18

Additional info:
cmdline:        /usr/bin/python /bin/ssm create -n /dev/guests/ipa --size 50G --fs ext4 -p guests
executable:     /bin/ssm
kernel:         3.7.4-204.fc18.x86_64
uid:            0

Truncated backtrace:
misc.py:397:run:RuntimeError: ERROR running command: "mkfs.ext4 /dev/guests//dev/guests/ipa"

Traceback (most recent call last):
  File "/bin/ssm", line 33, in <module>
    sys.exit(main.main())
  File "/usr/lib/python2.7/site-packages/ssmlib/main.py", line 1485, in main
    args.func(args)
  File "/usr/lib/python2.7/site-packages/ssmlib/main.py", line 955, in create
    if self._create_fs(args.fstype, lvname) != 0:
  File "/usr/lib/python2.7/site-packages/ssmlib/main.py", line 757, in _create_fs
    return misc.run(command, stdout=True)[0]
  File "/usr/lib/python2.7/site-packages/ssmlib/misc.py", line 397, in run
    raise RuntimeError(err_msg)
RuntimeError: ERROR running command: "mkfs.ext4 /dev/guests//dev/guests/ipa"

Local variables in innermost frame:
return_stdout: True
cmd: ['mkfs.ext4', '/dev/guests//dev/guests/ipa']
stdout: None
show_cmd: False
stdin_data: None
stdin: None
err_msg: 'ERROR running command: "mkfs.ext4 /dev/guests//dev/guests/ipa"'
can_fail: False
stderr: -2
error: None
output: None
proc: <subprocess.Popen object at 0x7f9248ce7f90>