Re: anyway to re-connect disk after "rejecting I/O to dead device" message in dmesg without cycling power to the device?

[Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>]

On Mon, 26 Jun 2006, t35t0r wrote:

> Hi,
> 
> Is there anyway to re-connect a USB disk (without cycling power to the
> device) after "rejecting I/O to dead device" messages crop up under
> dmesg or /var/log/messages?

It depends on exactly what's going wrong.  If the device's firmware has
crashed badly then you will have to cycle the device's power supply.  If
there's a hardware incompatibility between the computer's USB controller
and the device's then you won't be able to connect them at all.

> I've tried Kurt Garloff's rescan-scsi-bus.sh script but that didn't
> help. The drive that is causing headaches is a lacie G935 d2 (1TB,
> raid 0).

You could try doing

	rmmod usb-storage ; modprobe usb-storage

If you have more than one USB mass-storage device, this will reset all of 
them.  There are ways to do the same thing to just a single device, but 
there's no guarantee that it will work.

Alan Stern


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