Comment 21 for bug 530227

run:
"sudo mv /lib/udev/udisks-probe-ata-smart{,.disabled}"

and reboot, message dmesg:

[ 59.384030] usb 1-1: new high speed USB device using ehci_hcd and address 3
[ 59.517219] usb 1-1: configuration #1 chosen from 1 choice
[ 59.567105] Initializing USB Mass Storage driver...
[ 59.567214] scsi6 : SCSI emulation for USB Mass Storage devices
[ 59.567357] usbcore: registered new interface driver usb-storage
[ 59.567360] USB Mass Storage support registered.
[ 59.574227] usb-storage: device found at 3
[ 59.574230] usb-storage: waiting for device to settle before scanning
[ 64.572250] usb-storage: device scan complete
[ 64.572737] scsi 6:0:0:0: Direct-Access Samsung S2 Portable PQ: 0 ANSI: 2 CCS
[ 64.574736] sd 6:0:0:0: Attached scsi generic sg3 type 0
[ 64.575468] sd 6:0:0:0: [sdc] 625142448 512-byte logical blocks: (320 GB/298 GiB)
[ 64.576363] sd 6:0:0:0: [sdc] Write Protect is off
[ 64.576367] sd 6:0:0:0: [sdc] Mode Sense: 34 00 00 00
[ 64.576370] sd 6:0:0:0: [sdc] Assuming drive cache: write through
[ 64.582353] sd 6:0:0:0: [sdc] Assuming drive cache: write through
[ 64.582360] sdc: sdc1
[ 64.609352] sd 6:0:0:0: [sdc] Assuming drive cache: write through
[ 64.609359] sd 6:0:0:0: [sdc] Attached SCSI disk
[ 72.928037] usb 1-1: reset high speed USB device using ehci_hcd and address 3
[ 80.928033] usb 1-1: reset high speed USB device using ehci_hcd and address 3
[ 82.076039] Clocksource tsc unstable (delta = -268335144 ns)