<computeroutput># </computeroutput><userinput>mdadm /dev/md1 --fail /dev/sde
</userinput><computeroutput>mdadm: set /dev/sde faulty in /dev/md1
# </computeroutput><userinput>mdadm --detail /dev/md1
</userinput><computeroutput>/dev/md1:
           Version : 1.2
     Creation Time : Mon Feb 28 02:07:48 2022
        Raid Level : raid1
        Array Size : 4189184 (4.00 GiB 4.29 GB)
     Used Dev Size : 4189184 (4.00 GiB 4.29 GB)
      Raid Devices : 2
     Total Devices : 2
       Persistence : Superblock is persistent

       Update Time : Mon Feb 28 02:15:34 2022
             State : clean, degraded 
    Active Devices : 1
   Working Devices : 1
    Failed Devices : 1
     Spare Devices : 0

Consistency Policy : resync

              Name : debian:1  (local to host debian)
              UUID : 2dfb7fd5:e09e0527:0b5a905a:8334adb8
            Events : 19

    Number   Major   Minor   RaidDevice State
       0       8       34        0      active sync   /dev/sdd2
       -       0        0        1      removed

       1       8       48        -      faulty   /dev/sde
</computeroutput>
<computeroutput># </computeroutput><userinput>mdadm /dev/md1 --fail /dev/sde</userinput>
<computeroutput>mdadm: set /dev/sde faulty in /dev/md1
# </computeroutput><userinput>mdadm --detail /dev/md1</userinput>
<computeroutput>/dev/md1:
[...]
    Update Time : Wed May  6 09:39:39 2015
          State : clean, degraded 
 Active Devices : 1
Working Devices : 1
 Failed Devices : 1
  Spare Devices : 0

           Name : mirwiz:1  (local to host mirwiz)
           UUID : 6ec558ca:0c2c04a0:19bca283:95f67464
         Events : 19

    Number   Major   Minor   RaidDevice State
       0       8       50        0      active sync   /dev/sdd2
       2       0        0        2      removed

       1       8       64        -      faulty   /dev/sde</computeroutput>