RBD-error

[root@storage0105-ib rados-classes]# modprobe rbd
[root@storage0105-ib rados-classes]# rbd map disk1 --pool rbd
rbd: add failed: (5) Input/output error
[root@storage0105-ib rados-classes]#
[root@storage0105-ib rados-classes]# rbd showmapped
[root@storage0105-ib rados-classes]# cat /etc/redhat-release
CentOS release 6.5 (Final)
[root@storage0105-ib rados-classes]#
[root@storage0105-ib rados-classes]# uname -a
Linux storage0105-ib.pocstor 3.10.36-1.el6.elrepo.x86_64 #1 SMP Thu Apr 3 22:00:30 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux
[root@storage0105-ib rados-classes]#
[root@storage0105-ib rados-classes]# ceph -v
ceph version 0.79-125-gcf69bdb (cf69bdbd7498a151b251b20c1552003c82f26db7)
[root@storage0105-ib rados-classes]#