Hard drive not always mounting

From looking at your two provided logs you have a different problem to the one we are trying to fix in the thread you posted in - the issue that is being discussed there is that the USB device is connected and working but udisks-glue is unable to detect the file system type on the partition(s). This gives an error like this in the log:

Sep 10 18:02:42 osmc udisks-glue[325]: Device /dev/sda1 did not match any rules

The problem you have (from your log) is that your USB hard drive is not being detected at all by the kernel - if you search for ‘sda’ in both your logs you’ll see that sda is not even mentioned anywhere in the first log. This is a completely different problem, so I have moved your post to a new thread.

Furthermore there is something a bit fishy in your logs, in the second one where your USB drive mounts I can see a hard drive is connected:

Sep 14 07:20:09 osmc kernel: usb 1-1.4.5.3: new high-speed USB device number 9 using dwc_otg
Sep 14 07:20:09 osmc connmand[235]: Connection Manager version 1.29
Sep 14 07:20:09 osmc kernel: usb 1-1.4.5.3: New USB device found, idVendor=07ab, idProduct=fc88
Sep 14 07:20:09 osmc kernel: usb 1-1.4.5.3: New USB device strings: Mfr=1, Product=11, SerialNumber=5
Sep 14 07:20:09 osmc kernel: usb 1-1.4.5.3: Product: Imation Apollo UX
Sep 14 07:20:09 osmc kernel: usb 1-1.4.5.3: Manufacturer: JMicron
Sep 14 07:20:09 osmc kernel: usb 1-1.4.5.3: SerialNumber: 33261F131A15
Sep 14 07:20:09 osmc kernel: usb-storage 1-1.4.5.3:1.0: USB Mass Storage device detected
Sep 14 07:20:09 osmc kernel: scsi host0: usb-storage 1-1.4.5.3:1.0

However in the first log there is no sign of the hard drive, but instead a Samsung phone appears:

Sep 14 07:17:35 osmc kernel: usb 1-1.4.5.4: new high-speed USB device number 9 using dwc_otg
Sep 14 07:17:35 osmc kernel: usb 1-1.4.5.4: New USB device found, idVendor=04e8, idProduct=6860
Sep 14 07:17:35 osmc kernel: usb 1-1.4.5.4: New USB device strings: Mfr=2, Product=3, SerialNumber=4
Sep 14 07:17:35 osmc kernel: usb 1-1.4.5.4: Product: SAMSUNG_Android
Sep 14 07:17:35 osmc kernel: usb 1-1.4.5.4: Manufacturer: SAMSUNG
Sep 14 07:17:35 osmc kernel: usb 1-1.4.5.4: SerialNumber: 0019ac1f20a35e

Can you confirm that the hard drive was still connected or comment on the phone being connected in its place ?

Almost certainly your issue a hardware problem with the USB drive, USB hub or cabling/power adaptors if the USB device for the drive enclosure is not even detected at all by the kernel.