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From Transwiki

The following is a bit obsolete with udev and etch - I'm leaving it here for debugging reference.

For internal USB card readers. You will want to install sg3-utils. The devices show up as scsi drives

After booting your machine, try a lsmod and make sure you see the following (mixed in with others of course).:

# lsmod
usb-storage
usbcore
uhci-hcd
scsi_mod

Next try a scan and you should see something like below - sg2 - sg5 is the card reader.

# sg_scan -i
/dev/sg0: scsi0 channel=0 id=0 lun=0 [em]
[rmb=0 cmdq=0 pqual=0 pdev=0x0]
/dev/sg1: scsi1 channel=0 id=0 lun=0 [em]
[rmb=0 cmdq=0 pqual=0 pdev=0x0]
/dev/sg2: scsi4 channel=0 id=0 lun=0 [em]
   Generic   STORAGE DEVICE    9144 [rmb=1 cmdq=0 pqual=0 pdev=0x0]
/dev/sg3: scsi4 channel=0 id=0 lun=1 [em]
   Generic   STORAGE DEVICE    9144 [rmb=1 cmdq=0 pqual=0 pdev=0x0]
/dev/sg4: scsi4 channel=0 id=0 lun=2 [em]
   Generic   STORAGE DEVICE    9144 [rmb=1 cmdq=0 pqual=0 pdev=0x0]
/dev/sg5: scsi4 channel=0 id=0 lun=3 [em]
   Generic   STORAGE DEVICE    9144 [rmb=1 cmdq=0 pqual=0 pdev=0x0]
/dev/sg6: scsi5 channel=0 id=0 lun=0 [em]
   EPSON     GT-9700           1.04 [rmb=0 cmdq=0 pqual=0 pdev=0x3]

Now a map will give you your real devices - below sdc - sd5 are the drive slots

# sg_map

/dev/sg0 /dev/sda
/dev/sg1 /dev/sdb
/dev/sg2 /dev/sdc
/dev/sg3 /dev/sdd
/dev/sg4 /dev/sde
/dev/sg5 /dev/sdf
/dev/sg6<

Just put entries in fstab like :

/dev/sdc1       /media/cflash   vfat    noauto,owner,users,rw            0       0
/dev/sde1       /media/mmcard   vfat    noauto,owner,users,rw            0       0
/dev/sdf1       /media/mstick   vfat    noauto,owner,users,rw            0       0
/dev/sdg1       /media/thumb    vfat    noauto,owner,users,rw            0       0