Hi Sahina, I have a strange situation: 1. When I try to access the file via 'sudo -u vdsm dd if=disk of=test bs=4M' the command fails on aprox 60MB. 2. If I run same command as root , remove the file and then run again via vdsm user -> this time no i/o error reported. My guess is that I need to check what's going on the bricks themselve ... Best Regards, Strahil Nikolov