The issue was due to a version mismatch in the rbd binary that I was using. It 
was picking the old rbd instead of the ones I had compiled.

-----Original Message-----
From: Jason Dillaman [mailto:jdill...@redhat.com]
Sent: Thursday, December 08, 2016 2:05 AM
To: Aravind Ramesh <aravind.ram...@sandisk.com>
Cc: ceph-users@lists.ceph.com
Subject: Re: [ceph-users] RBD: Failed to map rbd device with data pool enabled.

I cannot recreate that "rbd feature disable" error using a master branch build 
from yesterday. Can you still reproduce this where your rbd CLI can create a 
data pool image but cannot access the image afterwards?

As for how to run against a librbd-backed client, it depends on what your end 
goal is. QEMU and fio are just two examples of applications that directly 
utilize librbd.
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