On Thu, 8 Jun 2006, Elladan wrote: > > > The problem with this is that I have other usb-storage devices. I'd > > > need a way to just re-probe the one that failed. > > > > There are a couple of ways to do it. For example, you can selectively > > unbind and rebind usb-storage to a particular USB interface by writing the > > interface's name to the "unbind" and "bind" files in > > /sys/bus/usb/drivers/usb-storage. > > Ah, thank you! Unfortunately, I don't have these bind/unbind knobs. I > guess I have to upgrade after all!
There are other approaches too. For instance, I vaguely recall something mentioned in the "SCSI Programming HOWTO" document. (I don't have it with me here, and it might be long out-of-date.) > > It's not a timeout; it's just a delay. Yes, the delay is there because > > some devices take a while to start up. You can change the length of that > > delay by setting a module parameter for usb-storage. For example, in > > /etc/modprobe.conf you might say: > > > > options usb-storage delay_use=10 > > > > to make that delay be 10 seconds long instead of the default 5 seconds. > > Ah, thank you. Unfortunately to get it to work, I think I'd have to set > it to be around 20 seconds. Might it be better if we could probe this > over and over? Then well-behaved devices could show up immediately. I doubt it would be better. More likely this would just cause lots of unnecessary extra activity and overhead in the much-more-common case of devices that don't work at all. > > > It returned -1 sectors... A bit odd, but clearly a magic number and not > > > garbage. > > > > On the contrary -- clearly garbage and not a magic number. A value of -1 > > means the device returned data in which all the bits are turned on, > > typical of what happens when a semiconductor device fails. It does not > > have any special magic meaning. > > I'll bet it does. Maybe not a WELL-DEFINED special meaning, of course. > :-) The only well-defined special meaning I know of is "I'm broken". Alan Stern _______________________________________________ Linux-usb-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
