how to access SD card via lexarmedia multi-card reader?

[Robert P. J. Day]

   i just got a lexar multi-card reader, plugged it into one of my
USB 1.1 ports, got confirmation via /var/log/messages:

Jun 25 13:27:13 localhost kernel: usb 1-1: new full speed USB device 
using address 4
Jun 25 13:27:14 localhost kernel: scsi1 : SCSI emulation for USB Mass 
Storage devices
Jun 25 13:27:14 localhost kernel:   Vendor: Lexar     Model: Media 
Inc. SM/xD  Rev: 009E
Jun 25 13:27:14 localhost kernel:   Type:   Direct-Access 
ANSI SCSI revision: 02
Jun 25 13:27:14 localhost kernel: Attached scsi removable disk sda at 
scsi1, channel 0, id 0, lun 0
Jun 25 13:27:14 localhost kernel: Attached scsi generic sg0 at scsi1, 
channel 0, id 0, lun 0,  type 0
Jun 25 13:27:15 localhost scsi.agent[3419]: disk at 
/devices/pci0000:00/0000:00:1f.2/usb1/1-1/1-1:1.0/host1/1:0:0:0
Jun 25 13:27:15 localhost udev[3474]: creating device node '/udev/sda'
Jun 25 13:27:15 localhost udev[3476]: creating device node '/udev/sg0'


which seems to verify that it knows about the device.  "usbview" also
confirms that there's a "Multi-Card Reader".  so far, so good.

now, as a test, look around, rip the SD card out of my sharp zaurus,
drop it in, the little green light on the reader comes on, good, and 
... ok, what device do i mount?  since /udev/sda is the block device 
of the two listed above, i try that but get "No medium found."

i'd try this with my CF card, but i don't have it handy.  anyone else
have one of these and know the incantation?  thanks.

rday