Hi, I can see many dd: sending ioctl 80306d02 to a partition! messages on my CentOS 7.1 SPM host. I the top I can see that lvm process is using 100%. My migration from iscsiA to iscsiB storage is terrible slow. The lvm process always changing its pid. /sbin/lvm lvextend --config devices { preferred_names = ["^/dev/mapper/"] ignore_suspended_devices=1 write_cache_state=0 disable_after_error_count=3 obtain_device_list_from_udev=0 filter = [ 'a|/dev/mapper/149455400000000007265735f69534353494c6f676963616c|/dev/mapper/360014056427aebd90ef41b1b5df2cd79|', 'r|.*|' ] } global { locking_type=1 prioritise_write_locks=1 wait_for_locks=1 use_lvmetad=0 } backup { retain_min = 50 retain_days = 0 } --autobackup n --size 5373952m ab17ac41-3c43-4a57-902e-a88577d4a6c1/a57c120c-190a-4122-8f71-5d78dd5279c1 Are there some problems with migration? I am using ovirt 3.5.x with iscsi storage. *********************************************************** Dr. Arman Khalatyan eScience -SuperComputing Leibniz-Institut für Astrophysik Potsdam (AIP) An der Sternwarte 16, 14482 Potsdam, Germany ***********************************************************