[CentOS] Yum error

Hi there,
I've installed C7 and I'm trying to use targetcli and other.
Until yesterday all works good.
Today I've runned yum update, that has updated glibc. Then I installed 
targetcli and targetd. After some operation on an md device like 
mount/umont.
After this, during yum install lsof I get:

.....
Install  1 Package

Total size: 331 k
Installed size: 927 k
Is this ok [y/d/N]: y
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Traceback (most recent call last):
   File "/usr/bin/yum", line 29, in <module>
     yummain.user_main(sys.argv[1:], exit_code=True)
   File "/usr/share/yum-cli/yummain.py", line 355, in user_main
     errcode = main(args)
   File "/usr/share/yum-cli/yummain.py", line 261, in main
     return_code = base.doTransaction()
   File "/usr/share/yum-cli/cli.py", line 771, in doTransaction
     resultobject = self.runTransaction(cb=cb)
   File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 1728, 
in runTransaction
     if self.fssnap.available and ((self.conf.fssnap_automatic_pre or
   File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 1125, 
in <lambda>
     fssnap = property(fget=lambda self: self._getFSsnap(),
   File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 1061, 
in _getFSsnap
     devices=devices)
   File "/usr/lib/python2.7/site-packages/yum/fssnapshots.py", line 156, 
in __init__
     self._vgnames = _list_vg_names()
   File "/usr/lib/python2.7/site-packages/yum/fssnapshots.py", line 59, 
in _list_vg_names
     stdout=subprocess.PIPE, stderr=subprocess.PIPE)
   File "/usr/lib64/python2.7/subprocess.py", line 711, in __init__
     errread, errwrite)
   File "/usr/lib64/python2.7/subprocess.py", line 1308, in _execute_child
     raise child_exception
OSError: [Errno 2] No such file or directory

(What file is for "No such file or directory"?)

Running yum with debug option I can't get useful information.

ls -1 /etc/yum.repos.d/
CentOS-Base.repo
CentOS-Debuginfo.repo
CentOS-fasttrack.repo
CentOS-Sources.repo
CentOS-Vault.repo

I've searched on google without good results.

Can point me in the right direction to solve this?

Thanks in advance.