On our SunBlade 100 and SunBlade 1500 machines, the usermount and userunmount commands now also support USB storage devices, as long as they’re FAT or VFAT-formatted. (FAT is the MS-DOS filesystem, and VFAT is the extended version introduced with Windows 95. These are the most common filesystems for USB devices, but you might encounter storage devices using other filesystem formats. Those devices can not be mounted on our Suns.) The directory names you can specify are /usb1, /usb2, /usb3, or /usb4. Which one you use depends on which USB port you’re plugging the device into; you may need to experiment a little to find out which port corresponds with which device on your machine. If you see `mount: No such device or address’, it probably means that the directory name you specified does not correspond to the port you have the device plugged in to. On the SunBlade 1500s, the left USB port on the front panel is /usb4, and the right one (next to the headphone jack) is /usb1.