After working around the iscsi logout (which may not have been fatal) over serial console I can see early filesystem mount errors for the iscsi volume:
dev-disk-by\x2duuid-cbe775ec\x2d57bd\x2d4b5d\x2db5e1\x2d1ccddf80ae28.device: Job dev-disk-by\x2duuid-cbe775ec\x2d57bd\x2d4b5d\x2db5e1\x2d1ccddf80ae28.device/start timed out.
Apr 20 20:53:24.097043 ubuntu systemd[1]: Timed out waiting for device dev-disk-by\x2duuid-cbe775ec\x2d57bd\x2d4b5d\x2db5e1\x2d1ccddf80ae28.device.
Apr 20 20:53:24.121055 ubuntu systemd[1]: Dependency failed for /mnt.
Apr 20 20:53:24.137007 ubuntu systemd[1]: Dependency failed for Local File Systems.
Apr 20 20:53:24.153056 ubuntu systemd[1]: local-fs.target: Job local-fs.target/start failed with result 'dependency'.
Apr 20 20:53:24.153063 ubuntu systemd[1]: local-fs.target: Triggering OnFailure= dependencies.
Apr 20 20:53:24.153370 ubuntu systemd[1]: mnt.mount: Job mnt.mount/start failed with result 'dependency'.
Apr 20 20:53:24.153381 ubuntu systemd[1]: dev-disk-by\x2duuid-cbe775ec\x2d57bd\x2d4b5d\x2db5e1\x2d1ccddf80ae28.device: Job dev-disk-by\x2duuid-cbe775ec\x2d57bd\x2d4b5d\x2db5e1\x2d1ccddf80ae28.device/start failed with result 'timeout'.
After working around the iscsi logout (which may not have been fatal) over serial console I can see early filesystem mount errors for the iscsi volume:
dev-disk- by\x2duuid- cbe775ec\ x2d57bd\ x2d4b5d\ x2db5e1\ x2d1ccddf80ae28 .device: Job dev-disk- by\x2duuid- cbe775ec\ x2d57bd\ x2d4b5d\ x2db5e1\ x2d1ccddf80ae28 .device/ start timed out. by\x2duuid- cbe775ec\ x2d57bd\ x2d4b5d\ x2db5e1\ x2d1ccddf80ae28 .device. target/ start failed with result 'dependency'. by\x2duuid- cbe775ec\ x2d57bd\ x2d4b5d\ x2db5e1\ x2d1ccddf80ae28 .device: Job dev-disk- by\x2duuid- cbe775ec\ x2d57bd\ x2d4b5d\ x2db5e1\ x2d1ccddf80ae28 .device/ start failed with result 'timeout'.
Apr 20 20:53:24.097043 ubuntu systemd[1]: Timed out waiting for device dev-disk-
Apr 20 20:53:24.121055 ubuntu systemd[1]: Dependency failed for /mnt.
Apr 20 20:53:24.137007 ubuntu systemd[1]: Dependency failed for Local File Systems.
Apr 20 20:53:24.153056 ubuntu systemd[1]: local-fs.target: Job local-fs.
Apr 20 20:53:24.153063 ubuntu systemd[1]: local-fs.target: Triggering OnFailure= dependencies.
Apr 20 20:53:24.153370 ubuntu systemd[1]: mnt.mount: Job mnt.mount/start failed with result 'dependency'.
Apr 20 20:53:24.153381 ubuntu systemd[1]: dev-disk-