Comment 14 for bug 1857914

Hello.

The problem is more complicated or simpler than I thought.

I tried again.
A) With version 18.04.3
  Formatting SDB1, SDB2 and SDB3
Creation of the P1, P2, P3 and P4 directories in the 3 partitions.
B) Reboot with version 19.10.
Deletion of the P1 directories in the three partitions.
Shrinking of the 3 partitions.
The partition SDB1 is destroyed but SDB2 and SDB3 are correct.
C) Reboot with version 19.10
Deletion of P2 directories in the two operational partitions.
Shrinking of the 2 partitions.
The partition SDB2 is destroyed but SDB3 is correct.
D) Reboot with version 19.10.
Shrinking of the SDB3 partition.
The SDB3 partition is correct.
E) Reboot with version 19.10
Creation of a P5 directory in SDB3
Copy files from the remaining SDB3 directory.
Delete old directory.
Shrinking of the SDB3 partition.
The SDB3 partition is now destroyed.