/dev/sdc1 and /dev/sdd1 is raided (RAID1) into /dev/md3. /dev/md3 is encrypted with luksSetup.
Last night I got DegradedArray events for /dev/sdc1. I shutdown the system, physically removed the disk, and booted back up again. Now there is no md3 according to /proc/mdstat
$ mdadm --detail /dev/md3
Working Devices : 1 Failed Devices : 0 Spare Devices : 0
Consistency Policy : resync
Name : xxx:3 UUID : 651393c9:1718e07a:6545908f:17100fe6 Events : 11103 Number Major Minor RaidDevice State - 0 0 0 removed 1 8 49 1 active sync /dev/sdd1
The physically remaining disk (the working one) is now called /dev/sdc. The partition type of /dev/sdc1 is "Linux RAID autodetect". I cannot open this with luksOpen, it doesn't even ask for password.
How can I physically remove the broken disk and keep using the working one? Right now I must keep the broken disk physically connected to the server to be able to continue using the working one.