I use raid via software, I have the following scenario.
Definitions of existing MD arrays
ARRAY / dev / md / 0 metadata = 1.2 UUID = 832db4cb: ea6a2d20: b200fd2d: 65a72b50 name = a signed host name: 0
ARRAY / dev / md / 2 metadata = 1.2 UUID = 95910e75: 3c5fce9e: 5689640d: 86695109 name = a signed host name: 2
ARRAY / dev / md / 1 metadata = 1.2 UUID = 578a8e41: c8d3b616: 8cbc0ce6: edc5058d name = a signed host name: 1
Md0 and md2 are raid1
Md1 is raid10
When restarting the server, an alert is triggered indicating that md0 and md2 “raid1 exclusively” indicating DeviceDisappeared
Despite the indicative of this problem, when executing the cat / proc / mdstat command, everything is normal … and I have no major problems, just this boring message, as long as the server is restarted.
Cat / proc / mdstat
Personalities: [raid1] [raid10]
Md1: active raid 10 sda6  sdd6  sdc6  sdb6 
1904433152 super blocks 1.2 pieces 512K 2 copies close [4/4] [UUUU]
Bitmap: 1/15 pages [4KB], part 65536KB
Md2: active (read only) raid1 sda5  sdd5  sdc5  sdb5 
23419904 super blocks 1.2 [4/4] [UUUU]
Md0: raid1 sda1  sdd1  sdc1  sdb1 
975296 super blocks 1.2 [4/4] [UUUU]
In syslog, the error appears.
Mdadm-raid : Generating udev events for MD arrays … done.
I already tried to rebuild the raid, but the error persists.
Does anyone have any idea of what can be done to fix it?