Hello, I think I have found the problem. I did 'tail -f /var/log/messages' then I plugged in the USB HDD. I got the following: --begin-- Jan 4 18:18:18 wert kernel: hub.c: new USB device 00:1d.1-2, assigned address 2 Jan 4 18:18:20 wert kernel: usb-uhci.c: interrupt, status 2, frame# 812 Jan 4 18:18:20 wert kernel: scsi2 : SCSI emulation for USB Mass Storage devices Jan 4 18:18:23 wert usb.agent[4454]: missing kernel or user mode driver usb-storage Jan 4 18:18:24 wert kernel: usb-uhci.c: interrupt, status 3, frame# 1973 Jan 4 18:18:24 wert kernel: sda: Unit Not Ready, sense: Jan 4 18:18:24 wert kernel: Current 00:00: sense key Not Ready Jan 4 18:18:24 wert kernel: Additional sense indicates Medium not present Jan 4 18:18:24 wert kernel: sda : READ CAPACITY failed. Jan 4 18:18:24 wert kernel: sda : status = 1, message = 00, host = 0, driver = 08 Jan 4 18:18:24 wert kernel: Current sd00:00: sense key Not Ready Jan 4 18:18:24 wert kernel: Additional sense indicates Medium not present Jan 4 18:18:24 wert kernel: sda : block size assumed to be 512 bytes, disk size 1GB. Jan 4 18:18:24 wert kernel: sda: test WP failed, assume Write Enabled Jan 4 18:18:24 wert kernel: sda: I/O error: dev 08:00, sector 0 Jan 4 18:18:24 wert kernel: I/O error: dev 08:00, sector 0 Jan 4 18:18:24 wert kernel: unable to read partition table Jan 4 18:18:24 wert kernel: Device not ready. Make sure there is a disc in the drive. Jan 4 18:18:24 wert kernel: Device not ready. Make sure there is a disc in the drive. Jan 4 18:18:24 wert kernel: inserting floppy driver for 2.4.22-1.2115.nptl Jan 4 18:18:27 wert kernel: floppy0: no floppy controllers found Jan 4 18:18:27 wert insmod: /lib/modules/2.4.22-1.2115.nptl/kernel/drivers/block/floppy.o: init_module: No such device Jan 4 18:18:27 wert insmod: Hint: insmod errors can be caused by incorrect module parameters, including invalid IO or IRQ parameters. You may find more information in syslog or the output from dmesg Jan 4 18:18:27 wert insmod: /lib/modules/2.4.22-1.2115.nptl/kernel/drivers/block/floppy.o: insmod block-major-2 failed Jan 4 18:18:27 wert kernel: usb-uhci.c: interrupt, status 2, frame# 1222 Jan 4 18:18:27 wert kernel: sda: Unit Not Ready, sense: Jan 4 18:18:27 wert kernel: Current 00:00: sense key Not Ready Jan 4 18:18:27 wert kernel: Additional sense indicates Medium not present Jan 4 18:18:27 wert kernel: sda : READ CAPACITY failed. Jan 4 18:18:27 wert kernel: sda : status = 1, message = 00, host = 0, driver = 08 Jan 4 18:18:27 wert kernel: Current sd00:00: sense key Not Ready Jan 4 18:18:27 wert kernel: Additional sense indicates Medium not present Jan 4 18:18:27 wert kernel: sda : block size assumed to be 512 bytes, disk size 1GB. Jan 4 18:18:27 wert kernel: sda: test WP failed, assume Write Enabled Jan 4 18:18:27 wert kernel: sda: I/O error: dev 08:00, sector 0 Jan 4 18:18:27 wert kernel: I/O error: dev 08:00, sector 0 Jan 4 18:18:27 wert kernel: unable to read partition table Jan 4 18:18:27 wert kernel: Device not ready. Make sure there is a disc in the drive. Jan 4 18:18:27 wert kernel: Device not ready. Make sure there is a disc in the drive. Jan 4 18:18:28 wert kernel: sda: Unit Not Ready, sense: Jan 4 18:18:28 wert kernel: Current 00:00: sense key Not Ready Jan 4 18:18:28 wert kernel: Additional sense indicates Medium not present Jan 4 18:18:28 wert kernel: sda : READ CAPACITY failed. Jan 4 18:18:28 wert kernel: sda : status = 1, message = 00, host = 0, driver = 08 Jan 4 18:18:28 wert kernel: Current sd00:00: sense key Not Ready Jan 4 18:18:28 wert kernel: Additional sense indicates Medium not present Jan 4 18:18:28 wert kernel: sda : block size assumed to be 512 bytes, disk size 1GB. Jan 4 18:18:28 wert kernel: sda: test WP failed, assume Write Enabled Jan 4 18:18:28 wert kernel: sda: I/O error: dev 08:00, sector 0 Jan 4 18:18:28 wert kernel: I/O error: dev 08:00, sector 0 Jan 4 18:18:28 wert kernel: unable to read partition table Jan 4 18:18:28 wert kernel: Device not ready. Make sure there is a disc in the drive. Jan 4 18:18:28 wert kernel: Device not ready. Make sure there is a disc in the drive. Jan 4 18:18:29 wert devlabel: devlabel service started/restarted --end--- There seems to be a problem with the usb-storage driver as seen from the line: Jan 4 18:18:23 wert usb.agent[4454]: missing kernel or user mode driver usb-storage After that everything bombs out. Interestingly, it works when I use a 128MB flash disk which uses the same usb-storage driver. Any suggestions welcome. Regards, Andrew