Distribution: Gentoo
Hardware Environment: Thinkpad T40
Device in question:

Problem Description: The Via USB VT6205 SD card reader will not detect any
mountable partitions on the flash memoryT:  Bus=02 Lev=01 Prnt=01 Port=01 Cnt=01
Dev#= 25 Spd=12  MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=040d ProdID=6205 Rev= 0.03
S:  Manufacturer=VIA Technologies Inc.
S:  Product=USB 2.0 Card Reader
S:  SerialNumber=000000000001
C:* #Ifs= 1 Cfg#= 2 Atr=80 MxPwr=100mA
I:  If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E:  Ad=81(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms

Steps to reproduce: Plug in the card reader with an SD card inserted. Attempt to
mount /dev/sda


dmesg output:
uhci_hcd 0000:00:1d.1: wakeup_rh (auto-start)
hub 2-0:1.0: state 5 ports 2 chg 0000 evt 0004
uhci_hcd 0000:00:1d.1: port 2 portsc 0083,00
hub 2-0:1.0: port 2, status 0101, change 0001, 12 Mb/s
hub 2-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x101
usb 2-2: new full speed USB device using uhci_hcd and address 25
usb 2-2: default language 0x0409
usb 2-2: new device strings: Mfr=1, Product=2, SerialNumber=3
usb 2-2: Product: USB 2.0 Card Reader
usb 2-2: Manufacturer: VIA Technologies Inc.
usb 2-2: SerialNumber: 000000000001
usb 2-2: hotplug
usb 2-2: adding 2-2:2.0 (config #2, interface 0)
usb 2-2:2.0: hotplug
usbserial_generic 2-2:2.0: usb_probe_interface
usbserial_generic 2-2:2.0: usb_probe_interface - got id
usb-storage 2-2:2.0: usb_probe_interface
usb-storage 2-2:2.0: usb_probe_interface - got id
scsi15 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 25
usb-storage: waiting for device to settle before scanning
  Vendor: VIA-P     Model: VT6205-DevH       Rev: 2.50
  Type:   Direct-Access                      ANSI SCSI revision: 02
SCSI device sda: 499712 512-byte hdwr sectors (256 MB)
sda: Write Protect is off
sda: Mode Sense: 0b 00 00 08
sda: assuming drive cache: write through
SCSI device sda: 499712 512-byte hdwr sectors (256 MB)
sda: Write Protect is off
sda: Mode Sense: 0b 00 00 08
sda: assuming drive cache: write through
 sda:<6>SCSI error : <15 0 0 0> return code = 0x10070000
end_request: I/O error, dev sda, sector 0
Buffer I/O error on device sda, logical block 0
SCSI error : <15 0 0 0> return code = 0x10070000
end_request: I/O error, dev sda, sector 0
Buffer I/O error on device sda, logical block 0
 unable to read partition table
Attached scsi removable disk sda at scsi15, channel 0, id 0, lun 0
usb-storage: device scan complete


After trying mount -t vfat /dev/sda /mnt/key:
SCSI error : <15 0 0 0> return code = 0x10070000
end_request: I/O error, dev sda, sector 0
FAT: unable to read boot sector


The device works in windows.