kyron src # dmesg | tail -n22
usb 5-2.2.2: new full speed USB device using ehci_hcd and address 27
usb 5-2.2.2: not running at top speed; connect to a high speed hub
usb 5-2.2.2: configuration #1 chosen from 1 choice
scsi18 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 27
usb-storage: waiting for device to settle before scanning
  Vendor: USB       Model: Flash Disk        Rev: 2.00
  Type:   Direct-Access                      ANSI SCSI revision: 02
ready
SCSI device sdf: 1017856 512-byte hdwr sectors (521 MB)
sdf: Write Protect is off
sdf: Mode Sense: 03 00 00 00
sdf: assuming drive cache: write through
SCSI device sdf: 1017856 512-byte hdwr sectors (521 MB)
sdf: Write Protect is off
sdf: Mode Sense: 03 00 00 00
sdf: assuming drive cache: write through
 sdf: sdf1
sd 18:0:0:0: Attached scsi removable disk sdf
sd 18:0:0:0: Attached scsi generic sg4 type 0
usb-storage: device scan complete
kyron src # fdisk /dev/sdf

Unable to open /dev/sdf