I found this in a few different places around the 'net - hopefully it's helpful:
View the Storage Devices That Are Displayed As "USB SCSI Storage Device" in Windows XP
USB devices that are using an SCSI-to-USB adapter are displayed as "USB SCSI Storage Device" in the Safely Remove Hardware icon in the taskbar. Finding which device you want to remove may be confusing if your computer has more than one of these devices.
- Open the Safely Remove Hardware dialog box, and then click to select the Display Device Components box.