Wheezy - External HDD Not Mounting

I am using Debian Wheezy, & recently purchased a Western Digital "My Book Essential" external hard drive (2TB). It is powered by an external power adapter.

When i initially plugged it in & attached it to my computer (while my computer was already booted to my desktop), Wheezy read it just fine.

I opened Gnome's Disk Utility & checked to be sure it said 2TB & all seemed fine.

I was then able to CUT about 100Gigs from an internal hard drive, & PASTE it onto the device.

Then i CUT another 400Gigs & was able to PASTE only about 350Gigs when i encountered an I/O error.

Unfortunately, I didn't take a screenshot of the error. I later discovered that all the data had made it safely to the External Drive, & the remaining 50Gigs was still on the internal disk (and was all able to be read just as it was).

The next thing i did was go back into the External Hard Drive via Disk Utility, & unmounted it. Shut it completely off... and rebooted my computer.

Now, when i plug the external Hard drive into my computer it doesn't mount or appear in Nautilus.

Below I have posted log files from message, system, and daemon.

Perhaps for a more readable format, i have also posted the same logs on pastebin here - http://pastebin.com/2LivNH6T

I was wondering if anyone could help me with this problem? I tried Googling the log entries to no avail.

I also don't have another computer in the house to see if the external drive is fine otherwise, because all i have is a netbook running debian, too.

Any help would be greatly appreciated! If there is any other information i could post to maybe track down the issue, please let me know!

Oct 11 17:39:21 desktop kernel: [15149.884035] usb 3-1: new full speed USB device number 2 using uhci_hcd

Oct 11 17:39:22 desktop kernel: [15151.272031] usb 3-1: new full speed USB device number 3 using uhci_hcd

Oct 11 17:39:23 desktop kernel: [15152.007045] usb 3-1: New USB device found, idVendor=1058, idProduct=1130

Oct 11 17:39:23 desktop kernel: [15152.007051] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3

Oct 11 17:39:23 desktop kernel: [15152.007055] usb 3-1: Product: My Book 1130

Oct 11 17:39:23 desktop kernel: [15152.007058] usb 3-1: Manufacturer: Western Digital

Oct 11 17:39:23 desktop kernel: [15152.007061] usb 3-1: SerialNumber: 5743415A4138383736343733

Oct 11 17:39:23 desktop kernel: [15152.011389] scsi11 : usb-storage 3-1:1.0

Oct 11 17:39:23 desktop mtp-probe: checking bus 3, device 3: "/sys/devices/pci0000:00/0000:00:1d.1/usb3/3-1"

Oct 11 17:39:23 desktop mtp-probe: bus: 3, device: 3 was not an MTP device

Oct 11 17:39:26 desktop kernel: [15155.125108] scsi 11:0:0:0: Direct-Access WD My Book 1130 1012 PQ: 0 ANSI: 6

Oct 11 17:39:26 desktop kernel: [15155.128140] scsi 11:0:0:1: Enclosure WD SES Device 1012 PQ: 0 ANSI: 6

Oct 11 17:39:26 desktop kernel: [15155.133431] sd 11:0:0:0: Attached scsi generic sg3 type 0

Oct 11 17:39:26 desktop kernel: [15155.133633] ses 11:0:0:1: Attached Enclosure device

Oct 11 17:39:26 desktop kernel: [15155.133783] ses 11:0:0:1: Attached scsi generic sg4 type 13

Oct 11 17:39:26 desktop kernel: [15155.160086] sd 11:0:0:0: [sdc] Test WP failed, assume Write Enabled

Oct 11 17:39:26 desktop kernel: [15155.192071] sd 11:0:0:0: [sdc] Test WP failed, assume Write Enabled

Oct 11 17:39:21 desktop kernel: [15149.884035] usb 3-1: new full speed USB device number 2 using uhci_hcd

Oct 11 17:39:21 desktop kernel: [15150.140061] hub 3-0:1.0: unable to enumerate USB device on port 1