Hello, I'm having the folloing behaviour with kernel 3.14.5 and mdadm v3.3.1. After stopping all arrays, I still can see one of them in /sys/block/: # cat /proc/mdstat Personalities : [raid1] md125 : active raid1 sdb3[1] sda3[0] 483688448 blocks super 1.2 [2/2] [UU] [======>..............] resync = 34.9% (169161280/483688448) finish=44.0min speed=118852K/sec bitmap: 3/4 pages [12KB], 65536KB chunk md126 : active raid1 sdb2[1] sda2[0] 4038656 blocks super 1.2 [2/2] [UU] md127 : active raid1 sdb1[1] sda1[0] 524224 blocks super 1.0 [2/2] [UU] unused devices: <none> # mdadm --stop /dev/md12[567] mdadm: stopped /dev/md125 mdadm: stopped /dev/md126 mdadm: stopped /dev/md127 # cat /proc/mdstat Personalities : [raid1] unused devices: <none> # ls /sys/block/ md126 sda sdb sdc sr0 # ls /sys/block/md126/md/ array_size array_state bitmap chunk_size component_size layout level max_read_errors metadata_version new_dev raid_disks reshape_direction reshape_position resync_start safe_mode_delay # dmesg .... [ 1573.715476] md125: detected capacity change from 495296970752 to 0 [ 1573.715626] md: md125 stopped. [ 1573.715633] md: unbind<sdb3> [ 1573.740681] md: export_rdev(sdb3) [ 1573.740694] md: unbind<sda3> [ 1573.754008] md: export_rdev(sda3) [ 1573.773398] md126: detected capacity change from 4135583744 to 0 [ 1573.773403] md: md126 stopped. [ 1573.773410] md: unbind<sdb2> [ 1573.820652] md: export_rdev(sdb2) [ 1573.820664] md: unbind<sda2> [ 1573.873974] md: export_rdev(sda2) [ 1573.889904] md127: detected capacity change from 536805376 to 0 [ 1573.889910] md: md127 stopped. [ 1573.889917] md: unbind<sdb1> [ 1573.913978] md: export_rdev(sdb1) [ 1573.914033] md: unbind<sda1> [ 1573.940627] md: export_rdev(sda1) After waiting a couple of min, stopping again md126 worked: [ 1835.755661] md: md126 stopped. Is this expected ? Thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html