Hello Nir, Thanks for your response and your time. I tried put the initial_size when I create the snapshot, but it hasn't worked. I attached 3 files: 1.- A bit of my code -> code.java 2.- Log where it show the JSON content of request SDK -> request.log         I create 4 snapshots, the POST requests are in lines:             31-163             363-494             605-736             849-980 3.- Text with size of disks and its disksSnapshots -> sizes.txt I'm trying in RHVM 4.2 version. Regards, Fran