I want to have external USB hard drives automatically mounted when plugged in. I have 2 drives exactly the same except for volume label. They both have the same UUID. I want to be easily able to swap them as I'm using them for backups and want to keep 1 at home for off site backup. I've set up the /etc/fstab so they should mount at different places based on their volume label:

/etc/fstab :
LABEL=Passport1 /media/Passport1 ntfs defaults,windows_names,locale=en_US.utf8 0 0 LABEL=Passport2 /media/Passport2 ntfs defaults,windows_names,locale=en_US.utf8 0 0

blkid shows :
...
/dev/sdc1: LABEL="Passport2" UUID="4E1AEA7B1AEA6007" TYPE="ntfs"
/dev/sdd1: LABEL="Passport1" UUID="4E1AEA7B1AEA6007" TYPE="ntfs"

They both mount automatically during reboot but do not mount when just plugged in to a running system. I've read lots of stuff about this, much of it is old so I'm not sure if it applies. I've read some stuff that says the mounts should happen automatically when plugged in, and lots of other stuff that says you have to install other software to make this happen, although much of it just seems to set up the fstab.

What's the real story?

Here is /var/log/syslog when drive is plugged in:

Dec 14 11:22:58 ausyvutims1 kernel: [66221.300196] usb 1-1: new high-speed USB device number 6 using ehci_hcd
Dec 14 11:22:58 ausyvutims1 mtp-probe: checking bus 1, device 6: "/sys/devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1/1-1"
Dec 14 11:22:58 ausyvutims1 mtp-probe: bus: 1, device: 6 was not an MTP device
Dec 14 11:22:58 ausyvutims1 kernel: [66221.656020] scsi7 : usb-storage 1-1:1.0
Dec 14 11:22:59 ausyvutims1 kernel: [66222.661534] scsi 7:0:0:0: Direct-Access     WD       My Passport 0748 1016 PQ: 0 ANSI: 6
Dec 14 11:22:59 ausyvutims1 kernel: [66222.666466] scsi 7:0:0:1: Enclosure         WD       SES Device       1016 PQ: 0 ANSI: 6
Dec 14 11:22:59 ausyvutims1 kernel: [66222.667739] sd 7:0:0:0: Attached scsi generic sg3 type 0
Dec 14 11:22:59 ausyvutims1 kernel: [66222.667913] ses 7:0:0:1: Attached Enclosure device
Dec 14 11:22:59 ausyvutims1 kernel: [66222.668047] ses 7:0:0:1: Attached scsi generic sg4 type 13
Dec 14 11:22:59 ausyvutims1 kernel: [66222.678473] sd 7:0:0:0: [sdc] 1953458176 512-byte logical blocks: (1.00 TB/931 GiB)
Dec 14 11:22:59 ausyvutims1 kernel: [66222.687700] sd 7:0:0:0: [sdc] Write Protect is off
Dec 14 11:22:59 ausyvutims1 kernel: [66222.687705] sd 7:0:0:0: [sdc] Mode Sense: 47 00 10 08
Dec 14 11:22:59 ausyvutims1 kernel: [66222.701076] sd 7:0:0:0: [sdc] No Caching mode page present
Dec 14 11:22:59 ausyvutims1 kernel: [66222.701081] sd 7:0:0:0: [sdc] Assuming drive cache: write through
Dec 14 11:22:59 ausyvutims1 kernel: [66222.738062] sd 7:0:0:0: [sdc] No Caching mode page present
Dec 14 11:22:59 ausyvutims1 kernel: [66222.738068] sd 7:0:0:0: [sdc] Assuming drive cache: write through
Dec 14 11:22:59 ausyvutims1 kernel: [66222.754558]  sdc: sdc1
Dec 14 11:22:59 ausyvutims1 kernel: [66222.792006] sd 7:0:0:0: [sdc] No Caching mode page present
Dec 14 11:22:59 ausyvutims1 kernel: [66222.792012] sd 7:0:0:0: [sdc] Assuming drive cache: write through
Dec 14 11:22:59 ausyvutims1 kernel: [66222.792016] sd 7:0:0:0: [sdc] Attached SCSI disk
Dec 14 11:22:59 ausyvutims1 ata_id[16971]: HDIO_GET_IDENTITY failed for '/dev/sdc': Invalid argument

Thanks for any help offered