On Sat, 19 Jun 2004, Daniel Drake wrote: > Hi, > > I've seen a few reports floating around lately that the sda1 node isn't > getting created on plugin of some usb-storage devices. > > In these situations, the sda node appears on plugin, but no partitons (e.g. > sda1) turn up until you do *something* with the sda node. > > Even if its as simple as: > fdisk -l /dev/sda > > Or even > touch /dev/sda > > I have gathered some logs of a situation like this, for the following device: > Vendor: M-Sys > Product: DiskOnKey > Serial Number: 0501631530002F06 > Protocol: Transparent SCSI > Transport: Bulk > Quirks:
Your logs are missing a lot of data. Try using "dmesg" instead of relying on syslog. > One workaround is to use hotplug. Some versions (not all) presumably do the > equivalent of "touch /dev/sda" when a device is detected - some see installing > hotplug as a solution to this, but it seems just to be masking the problem. > > Any ideas? > > Thanks. > Daniel >From things I've seen in the past, I'll guess that the device reports "No medium present" until it finishes initializing, which might require a few seconds. Since the usb-storage and other drivers try probing the device right away, they are forced to assume that there are no partitions and no data -- until something tells them to take a second look. It's not clear what the best solution to this is. But here's something you can try that might confirm my guess. Make sure all hotplug support is turned off so that drivers aren't loaded automatically. Make sure usb-storage isn't loaded and plug in the device. Then maybe 30 seconds later modprobe usb-storage and see if it detects the disk partitions. Alan Stern ------------------------------------------------------- This SF.Net email is sponsored by The 2004 JavaOne(SM) Conference Learn from the experts at JavaOne(SM), Sun's Worldwide Java Developer Conference, June 28 - July 1 at the Moscone Center in San Francisco, CA REGISTER AND SAVE! http://java.sun.com/javaone/sf Priority Code NWMGYKND _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
