On Thu, 15 Jan 2009, Iwo Mergler wrote: > > > > This shows the computer sending a TEST UNIT READY command to the drive, > > and the drive reporting Unit Attention: Media not present. So of > > course Linux believes there is no media loaded in the drive and doesn't > > try to read the partition table or anything else. > > > > Presumably if the drive is plugged in during bootup then the BIOS does > > something to make this error status go away. It's hard to guess what > > that would be, however. > > > > It could be a matter of timing. Some badly designed USB devices have a > dead time between power-up and being ready, but show up on the bus as > if they where. The "Media not present" thing could be a symptom of this. Good point. > To verify it, try inserting the device slowly. The power contacts in > the USB connector are longer than the data contacts and the device gets > more time to boot. Another timing-sensitive values you can set is the delay_use module parameter for usb-storage. It defaults to 5 seconds but perhaps you need a longer delay. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
