From: wwp <subscript at free.fr> > No, the device is not even accessible using /dev/sdXX. Gparted and > other tools don't even see it. But my laptop's internal disk and other > externals USB (SATA or IDE) disks are accessible. > The issue is not present with kernel 2.6.32-131.21.1.el6, > it's present with updates 2.6.32-220.4.1.el6 and 2.6.32-220.4.2.el6. > FYI it's a CentOS6 64bit installed on a DELL Latitude E6500. > I tried with another laptop (DELL D810) with an up-to-date CentOS6 > (32bit) installed on it: same behaviour, the disk is not accessible w/ > latest kernel but is accessible w/ 2.6.32-131. I was on a CentOS 5... I tried on a 2.6.32-220.4.1.el6.x86_64 and it still works fine with my USB key... usb 1-4: new high speed USB device using ehci_hcd and address 2 usb 1-4: New USB device found, idVendor=1b1c, idProduct=0b29 usb 1-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 1-4: Product: Voyager Mini usb 1-4: Manufacturer: Corsair usb 1-4: SerialNumber: 37b47c25e57156 usb 1-4: configuration #1 chosen from 1 choice Initializing USB Mass Storage driver... scsi4 : SCSI emulation for USB Mass Storage devices usbcore: registered new interface driver usb-storage USB Mass Storage support registered. usb-storage: device found at 2 usb-storage: waiting for device to settle before scanning usb-storage: device scan complete scsi 4:0:0:0: Direct-Access Corsair Voyager Mini 0.00 PQ: 0 ANSI: 2 sd 4:0:0:0: Attached scsi generic sg3 type 0 sd 4:0:0:0: [sdc] 15771759 512-byte logical blocks: (8.07 GB/7.52 GiB) sd 4:0:0:0: [sdc] Write Protect is off sd 4:0:0:0: [sdc] Mode Sense: 00 00 00 00 sd 4:0:0:0: [sdc] Assuming drive cache: write through sd 4:0:0:0: [sdc] Assuming drive cache: write through sdc: sdc1 sd 4:0:0:0: [sdc] Assuming drive cache: write through sd 4:0:0:0: [sdc] Attached SCSI removable disk So, apparently for you it stops just before the usbcore... Wild guess... USB3 drive? JD