On Sat, 26 Feb 2005 09:37:40 +0800, Bluesheet wrote: > During building the kernel, I found there have two situation failed in using > USB drive/USB flash disk. > 1/ Plug-in the USB drive/USB flash disk, the system didn't detect the > device, so using "lsmod", didn't load usb-storage module. > 2/ Plug-in the USB drive/USB flash disk, the system can detect the device, > using "lsmod", usb-storage loaded into system, but when I mount the usb > device, it occure " mount: /dev/sda1 is not a valid block device". > > and loaded modules when the system being started. > Module Size Used by Not tainted > ... > usb-uhci 26348 0 (unused) > ehci-hcd 20200 0 (unused) > usbcore 76288 1 [hid usb-uhci ehci-hcd] > ext3 72964 2 > jbd 59288 2 [ext3]
Maybe there's a module missing for the file system on the USB disk. Maybe it's vfat. And maybe, there are no partitions on it, so you can only mount /dev/sda, not /dev/sda1. I guess, as those USB modules are already loaded, a USB stick should appear in /proc somewhere when you plug it in (/proc/bus/usb...?). Does it? As far as I know, there are three ways to access the USB device then: - load the modules manually (with modprobe) - have them loaded automatically by the kernel - have them loaded automatically by a daemon For a storage device you need some USB modules and also some SCSI modules. Look into Documentation/scsi and Documentation/usb in the kernel source tree to find out what modules you need. Read the scsi.txt and scsi-generic.txt, they cleared things up a bit to me. I used USB only once yet, so I'm not the big expert here. I think you need usb-storage, sd, and vfat. Maybe you need sg too, I don't know. To make the kernel load modules automatically, you need 'alias' lines in /etc/modules.conf (there's a man page for modules.conf). I think the easiest way to access USB devices is a daemon like usbmgr or hotplug. Joern -- -- http://linuxfromscratch.org/mailman/listinfo/lfs-support FAQ: http://www.linuxfromscratch.org/lfs/faq.html Unsubscribe: See the above information page
