Okay, I've got an Acer 6x4x6 USB CD-RW drive that I'm trying to get set up in linux. I had no problems getting it detected or mounted. The problem comes when I run cdrecord -scanbus.
It gets to the "scsibus0:" line and then nothing else happens, it just sits there. So I kill it with CTRL-C, then try again. This time, it only gets to "Linux sg driver version: 3.1.24", and it won't let me kill it with CTRL-C, nor will it let me kill it with the kill command or the killall command. After cdrecord freezes up, when I try to reboot, it stops at the "Stopping USB and PCI hotplugging:" line, until I manually kill a script (not actually sure which one, the line from ps aux goes off the screen), and it goes on and finishes the shutdown.

Anybody got any suggestions? If you need any more info, I'll give it.
I just can't figure out why it is doing this and it's annoying the heck out of me. I'd like to be able to burn CDs

oh, and it might also help to point out that if I try to mount the drive after cdrecord freezes up, mount freezes and becomes unkillable as well.

Some more info:

some of the output from dmesg:

SCSI subsystem driver Revision: 1.00
kmod: failed to exec /sbin/modprobe -s -k scsi_hostadapter, errno = 2
kmod: failed to exec /sbin/modprobe -s -k scsi_hostadapter, errno = 2
kmod: failed to exec /sbin/modprobe -s -k scsi_hostadapter, errno = 2
...
scsi: <fdomain> Detection failed (no card)
...
usb.c: registered new driver usbdevfs
usb.c: registered new driver hub
uhci.c: USB Universal Host Controller Interface driver v1.1
uhci.c: USB UHCI at I/O 0xd400, IRQ 3
usb.c: new USB bus registered, assigned bus number 1
hub.c: USB hub found
hub.c: 2 ports detected
uhci.c: USB UHCI at I/O 0xd800, IRQ 3
usb.c: new USB bus registered, assigned bus number 2
hub.c: USB hub found
hub.c: 2 ports detected
usb.c: registered new driver hid
hid-core.c: v1.8.1 Andreas Gal, Vojtech Pavlik <vojtech@suse.cz>
hid-core.c: USB HID support drivers
Initializing USB Mass Storage driver...
usb.c: registered new driver usb-storage
USB Mass Storage support registered.
hub.c: new USB device 00:07.2-1, assigned address 2
hub.c: USB hub found
hub.c: 4 ports detected
...
hub.c: new USB device 00:07.2-1.1, assigned address 3
scsi0 : SCSI emulation for USB Mass Storage devices
Vendor: USB Model: CD-R/RW 6X4X6 Rev: E.BZ
Type: CD-ROM ANSI SCSI revision: 02
Attached scsi CD-ROM sr0 at scsi0, channel 0, id 0, lun 0
sr0: scsi3-mmc drive: 6x/6x writer cd/rw xa/form2 cdda tray
WARNING: USB Mass Storage data integrity not assured
USB Mass Storage device found at 3

I threw those scsi lines in there because I figured it might have something to do with the problem, but I'm not sure. Anyway, there don't seem to be any errors in there, which is why I'm still confused about what's going wrong.