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[update: i've tried reformatting the drive as HFS+ and still run into this problem] I have a 1TB Lacie USB 3.0 external hard drive that is formatted as exfat. I can't get it to mount my Intel NUC running Ubuntu 13.10. I've installed the exfat-fuse support. It does not show up when I run sudo fdisk -l and when I run dmesg after connecting the drive I see the following output:

ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
ehci-pci: EHCI PCI platform driver
ehci-pci 0000:00:1d.0: setting latency timer to 64
ehci-pci 0000:00:1d.0: EHCI Host Controller
ehci-pci 0000:00:1d.0: new USB bus registered, assigned bus number 1
ehci-pci 0000:00:1d.0: debug port 2
ehci-pci 0000:00:1d.0: cache line size of 64 is not supported
ehci-pci 0000:00:1d.0: irq 23, io mem 0xf7c3b000
ehci-pci 0000:00:1d.0: USB 2.0 started, EHCI 1.00
usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb1: Product: EHCI Host Controller
usb usb1: Manufacturer: Linux 3.11.0-17-generic ehci_hcd
usb usb1: SerialNumber: 0000:00:1d.0
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 8 ports detected
ehci-platform: EHCI generic platform driver
ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
ohci-pci: OHCI PCI platform driver
ohci-platform: OHCI generic platform driver
uhci_hcd: USB Universal Host Controller Interface driver
xhci_hcd 0000:00:14.0: setting latency timer to 64
xhci_hcd 0000:00:14.0: xHCI Host Controller
xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 2
xhci_hcd 0000:00:14.0: cache line size of 64 is not supported
xhci_hcd 0000:00:14.0: irq 58 for MSI/MSI-X
usb usb2: New USB device found, idVendor=1d6b, idProduct=0002
usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb2: Product: xHCI Host Controller
usb usb2: Manufacturer: Linux 3.11.0-17-generic xhci_hcd
usb usb2: SerialNumber: 0000:00:14.0
xHCI xhci_add_endpoint called for root hub
xHCI xhci_check_bandwidth called for root hub
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 9 ports detected
xhci_hcd 0000:00:14.0: xHCI Host Controller
xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 3
usb usb3: New USB device found, idVendor=1d6b, idProduct=0003
usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb3: Product: xHCI Host Controller
usb usb3: Manufacturer: Linux 3.11.0-17-generic xhci_hcd
usb usb3: SerialNumber: 0000:00:14.0
xHCI xhci_add_endpoint called for root hub
xHCI xhci_check_bandwidth called for root hub
hub 3-0:1.0: USB hub found
hub 3-0:1.0: 4 ports detected
i8042: PNP: No PS/2 controller found. Probing ports directly.
i8042: No controller found
tsc: Refined TSC clocksource calibration: 1696.075 MHz
mousedev: PS/2 mouse device common for all mice
rtc_cmos 00:05: RTC can wake from S4
rtc_cmos 00:05: rtc core: registered rtc_cmos as rtc0
rtc_cmos 00:05: alarms up to one month, y3k, 242 bytes nvram, hpet irqs
device-mapper: uevent: version 1.0.3
device-mapper: ioctl: 4.25.0-ioctl (2013-06-26) initialised: dm-devel@redhat.com
cpuidle: using governor ladder
cpuidle: using governor menu
ledtrig-cpu: registered to indicate activity on CPUs
EFI Variables Facility v0.08 2004-May-17
TCP: cubic registered
NET: Registered protocol family 10
NET: Registered protocol family 17
Key type dns_resolver registered
PM: Hibernation image not present or could not be loaded.
Loading module verification certificates
MODSIGN: Loaded cert 'Magrathea: Glacier signing key: 2a3861a17986e2fcfa4fcad981cb7e6fd9516274'
registered taskstats version 1
Key type trusted registered
Key type encrypted registered
AppArmor: AppArmor sha1 policy hashing enabled
   Magic number: 2:668:437
rtc_cmos 00:05: setting system clock to 2014-02-23 15:25:18 UTC (1393169118)
BIOS EDD facility v0.16 2004-Jun-25, 0 devices found
EDD information not available.
Freeing unused kernel memory: 1364K (ffffffff81d10000 - ffffffff81e65000)
Write protecting the kernel read-only data: 12288k
Freeing unused kernel memory: 1032K (ffff8800026fe000 - ffff880002800000)
Freeing unused kernel memory: 784K (ffff880002b3c000 - ffff880002c00000)
systemd-udevd[114]: starting version 204
pps_core: LinuxPPS API ver. 1 registered
pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
PTP clock support registered
ahci 0000:00:1f.2: version 3.0
ahci 0000:00:1f.2: irq 59 for MSI/MSI-X
xor: automatically using best checksumming function:
e1000e: Intel(R) PRO/1000 Network Driver - 2.3.2-k
e1000e: Copyright(c) 1999 - 2013 Intel Corporation.
ahci 0000:00:1f.2: AHCI 0001.0300 32 slots 2 ports 6 Gbps 0x8 impl SATA mode
ahci 0000:00:1f.2: flags: 64bit ncq pm led clo only pio slum part deso sadm sds apst 
ahci 0000:00:1f.2: setting latency timer to 64
scsi0 : ahci
scsi1 : ahci
scsi2 : ahci
scsi3 : ahci
ata1: DUMMY
ata2: DUMMY
ata3: DUMMY
ata4: SATA max UDMA/133 abar m2048@0xf7c3a000 port 0xf7c3a280 irq 59
e1000e 0000:00:19.0: setting latency timer to 64
e1000e 0000:00:19.0: Interrupt Throttling Rate (ints/sec) set to dynamic conservative mode
e1000e 0000:00:19.0: irq 60 for MSI/MSI-X
   avx       : 15491.000 MB/sec
device-mapper: dm-raid45: initialized v0.2594b
usb 1-1: new high-speed USB device number 2 using ehci-pci
e1000e 0000:00:19.0 eth0: registered PHC clock
e1000e 0000:00:19.0 eth0: (PCI Express:2.5GT/s:Width x1) ec:a8:6b:fe:e9:13
e1000e 0000:00:19.0 eth0: Intel(R) PRO/1000 Network Connection
e1000e 0000:00:19.0 eth0: MAC: 11, PHY: 12, PBA No: FFFFFF-0FF
usb 1-1: New USB device found, idVendor=8087, idProduct=8000
usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
hub 1-1:1.0: USB hub found
hub 1-1:1.0: 8 ports detected
ata4: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
ata4.00: supports DRM functions and may not be fully accessible
ata4.00: ATA-9: Crucial_CT120M500SSD3, MU03, max UDMA/133
ata4.00: 234441648 sectors, multi 16: LBA48 NCQ (depth 31/32), AA
ata4.00: supports DRM functions and may not be fully accessible
ata4.00: configured for UDMA/133
scsi 3:0:0:0: Direct-Access     ATA      Crucial_CT120M50 MU03 PQ: 0 ANSI: 5
sd 3:0:0:0: Attached scsi generic sg0 type 0
sd 3:0:0:0: [sda] 234441648 512-byte logical blocks: (120 GB/111 GiB)
sd 3:0:0:0: [sda] 4096-byte physical blocks
sd 3:0:0:0: [sda] Write Protect is off
sd 3:0:0:0: [sda] Mode Sense: 00 3a 00 00
sd 3:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
 sda: sda1 sda2 sda3
sd 3:0:0:0: [sda] Attached SCSI disk
usb 3-2: new SuperSpeed USB device number 2 using xhci_hcd
bio: create slab <bio-1> at 1
usb 3-2: New USB device found, idVendor=059f, idProduct=104c
usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 3-2: Product: d2 Quadra v3
usb 3-2: Manufacturer: LaCie
usb 3-2: SerialNumber: 355650394A37414A
usb-storage 3-2:1.0: USB Mass Storage device detected
scsi4 : usb-storage 3-2:1.0
usbcore: registered new interface driver usb-storage
EXT4-fs (dm-0): INFO: recovery required on readonly filesystem
EXT4-fs (dm-0): write access will be enabled during recovery
EXT4-fs (dm-0): recovery complete
EXT4-fs (dm-0): mounted filesystem with ordered data mode. Opts: (null)
Adding 8151036k swap on /dev/mapper/ubuntu--vg-swap_1.  Priority:-1 extents:1 across:8151036k SSFS
IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
systemd-udevd[390]: starting version 204
lp: driver loaded but no devices found
nuvoton-cir 00:08: IR PNP Port not valid!
EXT4-fs (dm-0): re-mounted. Opts: errors=remount-ro
mei_me 0000:00:16.0: setting latency timer to 64
mei_me 0000:00:16.0: irq 61 for MSI/MSI-X
ACPI Warning: 0x0000000000001828-0x000000000000182f SystemIO conflicts with Region \PMIO 1 (20130517/utaddress-251)
ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
ACPI Warning: 0x0000000000001c30-0x0000000000001c3f SystemIO conflicts with Region \GPRL 1 (20130517/utaddress-251)
ACPI Warning: 0x0000000000001c30-0x0000000000001c3f SystemIO conflicts with Region \GPR_ 2 (20130517/utaddress-251)
ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
ACPI Warning: 0x0000000000001c00-0x0000000000001c2f SystemIO conflicts with Region \GPRL 1 (20130517/utaddress-251)
ACPI Warning: 0x0000000000001c00-0x0000000000001c2f SystemIO conflicts with Region \GPR_ 2 (20130517/utaddress-251)
ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
lpc_ich: Resource conflict(s) found affecting gpio_ich
[drm] Initialized drm 1.1.0 20060810
type=1400 audit(1393169119.450:2): apparmor="STATUS" operation="profile_load" parent=452 profile="unconfined" name="/sbin/dhclient" pid=454 comm="apparmor_parser"
type=1400 audit(1393169119.450:3): apparmor="STATUS" operation="profile_load" parent=452 profile="unconfined" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=454 comm="apparmor_parser"
type=1400 audit(1393169119.450:4): apparmor="STATUS" operation="profile_load" parent=452 profile="unconfined" name="/usr/lib/connman/scripts/dhclient-script" pid=454 comm="apparmor_parser"
type=1400 audit(1393169119.450:5): apparmor="STATUS" operation="profile_replace" parent=452 profile="unconfined" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=454 comm="apparmor_parser"
type=1400 audit(1393169119.450:6): apparmor="STATUS" operation="profile_replace" parent=452 profile="unconfined" name="/usr/lib/connman/scripts/dhclient-script" pid=454 comm="apparmor_parser"
type=1400 audit(1393169119.450:7): apparmor="STATUS" operation="profile_replace" parent=452 profile="unconfined" name="/usr/lib/connman/scripts/dhclient-script" pid=454 comm="apparmor_parser"
[drm] Memory usable by graphics device = 2048M
i915 0000:00:02.0: setting latency timer to 64
microcode: CPU0 sig=0x40651, pf=0x40, revision=0x15
i915 0000:00:02.0: irq 62 for MSI/MSI-X
[drm] Supports vblank timestamp caching Rev 1 (10.10.2010).
[drm] Driver supports precise vblank timestamp query.
vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
Switched to clocksource tsc
i915 0000:00:02.0: No connectors reported connected with modes
[drm] Cannot find any crtc or sizes - going 1024x768
fbcon: inteldrmfb (fb0) is primary device
Console: switching to colour frame buffer device 128x48
i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
i915 0000:00:02.0: registered panic notifier
device-mapper: multipath: version 1.6.0 loaded
acpi device:46: registered as cooling_device9
ACPI: Video Device [GFX0] (multi-head: yes  rom: no  post: no)
 input: Video Bus as /devices/LNXSYSTM:00/device:00/PNP0A08:00/LNXVIDEO:00/input/input2
[drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
snd_hda_intel 0000:00:03.0: enabling device (0000 -> 0002)
HDA driver get symbol successfully from i915 module
snd_hda_intel 0000:00:03.0: irq 63 for MSI/MSI-X
snd_hda_intel 0000:00:1b.0: enabling device (0000 -> 0002)
snd_hda_intel 0000:00:1b.0: irq 64 for MSI/MSI-X
hda_codec: invalid CONNECT_LIST verb 5[1]:0
hda_codec: invalid CONNECT_LIST verb 6[1]:0
input: HDA Intel MID HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:03.0/sound/card0/input3
SKU: Nid=0x1d sku_cfg=0x40941905
SKU: port_connectivity=0x1
SKU: enable_pcbeep=0x1
SKU: check_sum=0x00000004
SKU: customization=0x00000019
SKU: external_amp=0x0
SKU: platform_type=0x1
SKU: swap=0x0
SKU: override=0x1
autoconfig: line_outs=1 (0x21/0x0/0x0/0x0/0x0) type:hp
   speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
   hp_outs=0 (0x0/0x0/0x0/0x0/0x0)
   mono: mono_out=0x0
   inputs:
     Mic=0x19
     Internal Mic=0x12
realtek: No valid SSID, checking pincfg 0x40941905 for NID 0x1d
realtek: Enabling init ASM_ID=0x1905 CODEC_ID=10ec0283
input: HDA Intel MID HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:03.0/sound/card0/input4
input: HDA Intel PCH Headphone as /devices/pci0000:00/0000:00:1b.0/sound/card1/input5
input: HDA Intel PCH Mic as /devices/pci0000:00/0000:00:1b.0/sound/card1/input6
microcode: CPU1 sig=0x40651, pf=0x40, revision=0x15
microcode: CPU2 sig=0x40651, pf=0x40, revision=0x15
microcode: CPU3 sig=0x40651, pf=0x40, revision=0x15
microcode: Microcode Update Driver: v2.00 <tigran@aivazian.fsnet.co.uk>, Peter Oruba
Bluetooth: Core ver 2.16
NET: Registered protocol family 31
Bluetooth: HCI device and connection manager initialized
Bluetooth: HCI socket layer initialized
Bluetooth: L2CAP socket layer initialized
Bluetooth: SCO socket layer initialized
Bluetooth: BNEP (Ethernet Emulation) ver 1.3
Bluetooth: BNEP filters: protocol multicast
Bluetooth: BNEP socket layer initialized
Bluetooth: RFCOMM TTY layer initialized
Bluetooth: RFCOMM socket layer initialized
Bluetooth: RFCOMM ver 1.11
init: failsafe main process (697) killed by TERM signal
init: avahi-cups-reload main process (778) terminated with status 1
ppdev: user-space parallel port driver
parport0: PC-style at 0x378 (0x778) [PCSPP,TRISTATE]
parport0: irq 0 detected
lp0: using parport0 (polling).
type=1400 audit(1393169120.363:8): apparmor="STATUS" operation="profile_load" parent=958 profile="unconfined" name="/usr/lib/x86_64-linux-gnu/lightdm-remote-session-freerdp/freerdp-session-wrapper" pid=964 comm="apparmor_parser"
type=1400 audit(1393169120.363:9): apparmor="STATUS" operation="profile_load" parent=958 profile="unconfined" name="chromium_browser" pid=964 comm="apparmor_parser"
type=1400 audit(1393169120.363:10): apparmor="STATUS" operation="profile_replace" parent=958 profile="unconfined" name="chromium_browser" pid=964 comm="apparmor_parser"
e1000e 0000:00:19.0: irq 60 for MSI/MSI-X
e1000e 0000:00:19.0: irq 60 for MSI/MSI-X
IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
init: gdm main process (1137) killed by TERM signal
[drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
ahci 0000:00:1f.2: port does not support device sleep
e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
scsi 4:0:0:0: Direct-Access     LaCie    d2 Quadra v3     223X PQ: 0 ANSI: 4
sd 4:0:0:0: Attached scsi generic sg1 type 0
sd 4:0:0:0: [sdb] 1953519616 512-byte logical blocks: (1.00 TB/931 GiB)
usb 3-2: Disable of device-initiated U1 failed.
usb 3-2: Disable of device-initiated U2 failed.
usb 3-2: Device not responding to set address.
usb 3-2: Device not responding to set address.
usb 3-2: device not accepting address 2, error -71
usb 3-2: USB disconnect, device number 2
sd 4:0:0:0: [sdb] Write Protect is off
sd 4:0:0:0: [sdb] Mode Sense: 4b 00 10 08
sd 4:0:0:0: [sdb] Asking for cache data failed
sd 4:0:0:0: [sdb] Assuming drive cache: write through
sd 4:0:0:0: [sdb] READ CAPACITY failed
sd 4:0:0:0: [sdb]  
Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
sd 4:0:0:0: [sdb] Sense not available.
sd 4:0:0:0: [sdb] No Caching mode page found
sd 4:0:0:0: [sdb] Assuming drive cache: write through
sdb: detected capacity change from 1000202043392 to 0
sd 4:0:0:0: [sdb] READ CAPACITY failed
sd 4:0:0:0: [sdb]  
Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
sd 4:0:0:0: [sdb] Sense not available.
sd 4:0:0:0: [sdb] No Caching mode page found
sd 4:0:0:0: [sdb] Assuming drive cache: write through
sd 4:0:0:0: [sdb] Attached SCSI disk
xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff88020f8a0ec0
xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff88020f8a0e80
systemd-hostnamed[2217]: Warning: nss-myhostname is not installed. Changing the local hostname might make it unresolveable. Please install nss-myhostname!
usb 3-2: new SuperSpeed USB device number 3 using xhci_hcd
usb 3-2: New USB device found, idVendor=059f, idProduct=104c
usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 3-2: Product: d2 Quadra v3
usb 3-2: Manufacturer: LaCie
usb 3-2: SerialNumber: 355650394A37414A
usb-storage 3-2:1.0: USB Mass Storage device detected
scsi5 : usb-storage 3-2:1.0
scsi 5:0:0:0: Direct-Access     LaCie    d2 Quadra v3     223X PQ: 0 ANSI: 4
sd 5:0:0:0: Attached scsi generic sg1 type 0
sd 5:0:0:0: [sdb] 1953519616 512-byte logical blocks: (1.00 TB/931 GiB)
usb 3-2: Disable of device-initiated U1 failed.
usb 3-2: Disable of device-initiated U2 failed.
usb 3-2: Device not responding to set address.
usb 3-2: Device not responding to set address.
usb 3-2: device not accepting address 3, error -71
usb 3-2: USB disconnect, device number 3
sd 5:0:0:0: [sdb] Write Protect is off
sd 5:0:0:0: [sdb] Mode Sense: 4b 00 10 08
sd 5:0:0:0: [sdb] No Caching mode page found
sd 5:0:0:0: [sdb] Assuming drive cache: write through
sd 5:0:0:0: [sdb] READ CAPACITY failed
sd 5:0:0:0: [sdb]  
Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
sd 5:0:0:0: [sdb] Sense not available.
sd 5:0:0:0: [sdb] Asking for cache data failed
sd 5:0:0:0: [sdb] Assuming drive cache: write through
sdb: detected capacity change from 1000202043392 to 0
sd 5:0:0:0: [sdb] READ CAPACITY failed
sd 5:0:0:0: [sdb]  
Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
sd 5:0:0:0: [sdb] Sense not available.
sd 5:0:0:0: [sdb] No Caching mode page found
sd 5:0:0:0: [sdb] Assuming drive cache: write through
sd 5:0:0:0: [sdb] Attached SCSI disk
xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff8801cfe306c0
xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff8801cfe30680
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