From: wwp subscript@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