In 66-snapd-autoimport.rules, auto-import been applied to each drive to find auto-import.assertion.
There are two cases will cause the service failed:
1. If the last block device which checked by the service is an invalid file-system, then the service will be marked as failed due to mount failed.
2. If the partitions already been mounted, so it returns error: cannot create user: device already managed.
In 66-snapd- autoimport. rules, auto-import been applied to each drive to find auto-import. assertion.
There are two cases will cause the service failed:
1. If the last block device which checked by the service is an invalid file-system, then the service will be marked as failed due to mount failed.
2. If the partitions already been mounted, so it returns error: cannot create user: device already managed.