USB drive is a CDROM drive and is not writable

[Michael M. Press]

I have a 2 gigabyte USB memory stick from made by PNY. When I plug it in, I
get the following:

umass0: vendor 0x0930 USB Flash Memory, rev 2.00/2.00, addr 2
da0 at umass-sim0 bus 0 target 0 lun 0
da0: < USB Flash Memory 6.50> Removable Direct Access SCSI-0 device
da0: 40.000MB/s transfers
da0: 1901MB (3894975 512 byte sectors: 255H 63S/T 242C)
cd1 at umass-sim0 bus 0 target 0 lun 1
cd1: < USB Flash Memory 6.50> Removable CD-ROM SCSI-0 device
cd1: 40.000MB/s transfers
cd1: Attempt to query device size failed: NOT READY, Medium not present

I want to be able to mount the device read-write, so I use the
following command:

mount -t cd9660 -o rw /dev/cd1 /media/flashdrv

The command runs without spitting any errors at me, but it does a read-only
mount. I can see files on the drive, but (of course) I can't change them. Does
my problem have anything to do with the device being detected as a CD-ROM
drive? If that is what's wrong I don't really know where to start
looking to fix it.
Any ideas?

-- I have 'device pass' in my kernel
-- I am using 6.2 prerelease