I have observed that: If md array is created with partitioned disk, the state change with array degrade is working as expected. Verified with kernel 4.2.0-23-generic
1. Create md array with partitioned disk # mdadm --detail /dev/md500 /dev/md500: Version : 1.2 Creation Time : Mon Feb 15 16:17:59 2016 Raid Level : raid1 Array Size : 11709312 (11.17 GiB 11.99 GB) Used Dev Size : 11709312 (11.17 GiB 11.99 GB) Raid Devices : 2 Total Devices : 2 Persistence : Superblock is persistent Update Time : Mon Feb 15 16:19:55 2016 State : clean Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 Name : blrfsserv149:500 (local to host blrfsserv149) UUID : d76dbca0:5ff06b36:8057cfde:96d9475b Events : 17 Number Major Minor RaidDevice State 0 8 81 0 active sync /dev/sdf1 1 8 97 1 active sync /dev/sdg1 2. Offline the scsi device using scsi command # lsscsi | grep sdf [0:2:5:0] disk DELL PERC H730 Mini 4.25 /dev/sdf # echo 1 > /sys/bus/scsi/devices/0:2:5:0/delete # lsscsi | grep sdf 3. Check the details of md array, the state is changed from clean to clean,degraded # mdadm --detail /dev/md500 /dev/md500: Version : 1.2 Creation Time : Mon Feb 15 16:17:59 2016 Raid Level : raid1 Array Size : 11709312 (11.17 GiB 11.99 GB) Used Dev Size : 11709312 (11.17 GiB 11.99 GB) Raid Devices : 2 Total Devices : 1 Persistence : Superblock is persistent Update Time : Mon Feb 15 16:21:02 2016 State : clean, degraded Active Devices : 1 Working Devices : 1 Failed Devices : 0 Spare Devices : 0 Name : blrfsserv149:500 (local to host blrfsserv149) UUID : d76dbca0:5ff06b36:8057cfde:96d9475b Events : 20 Number Major Minor RaidDevice State 0 0 0 0 removed 1 8 97 1 active sync /dev/sdg1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1543003 Title: Mdadm –detail command is not displaying the state of a degraded md array as degraded To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mdadm/+bug/1543003/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
