I have a 16GB Hama usb stick and I'm using it on Ubuntu 14.04. Until yesterday it worked fine, but my Linux crashed and I had to copy some files on it using the low graphics interface. Anyways the files where copied and I reinstalled the system, but now I don't see my drive. Any other drives work.

This is what I get with dmesg | grep -i usb

[ 3028.034004] usb 2-1.6: reset high-speed USB device number 6 using ehci-pci

[ 3038.195532] usb 2-1.6: reset high-speed USB device number 6 using ehci-pci

[ 3054.355731] usb 2-1.6: reset high-speed USB device number 6 using ehci-pci

[ 3054.523730] usb 2-1.6: reset high-speed USB device number 6 using ehci-pci

[ 3064.685451] usb 2-1.6: reset high-speed USB device number 6 using ehci-pci

[ 3522.645454] usb 2-1.6: USB disconnect, device number 6

[ 3542.867682] usb 2-1.6: new high-speed USB device number 7 using ehci-pci

[ 3542.960989] usb 2-1.6: New USB device found, idVendor=058f, idProduct=6366

[ 3542.960994] usb 2-1.6: New USB device strings: Mfr=1, Product=2, SerialNumber=3

[ 3542.960998] usb 2-1.6: Product: Flash Card Reader/Writer

[ 3542.961000] usb 2-1.6: Manufacturer: Generic

[ 3542.961002] usb 2-1.6: SerialNumber: 058F63666438

[ 3542.961388] usb-storage 2-1.6:1.0: USB Mass Storage device detected

[ 3542.962447] scsi10 : usb-storage 2-1.6:1.0

[ 3574.943893] usb 2-1.6: reset high-speed USB device number 7 using ehci-pci

[ 3585.105482] usb 2-1.6: reset high-speed USB device number 7 using ehci-pci

[ 3601.265555] usb 2-1.6: reset high-speed USB device number 7 using ehci-pci

[ 3601.433364] usb 2-1.6: reset high-speed USB device number 7 using ehci-pci

[ 3611.594898] usb 2-1.6: reset high-speed USB device number 7 using ehci-pci

This is what I get with lsusb

Bus 002 Device 007: ID 058f:6366 Alcor Micro Corp. Multi Flash Reader

Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub

Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 001 Device 004: ID 0461:4d51 Primax Electronics, Ltd 0Y357C PMX-MMOCZUL (B) [Dell Laser Mouse]

Bus 001 Device 005: ID 413c:2110 Dell Computer Corp. 

Bus 001 Device 003: ID 413c:1010 Dell Computer Corp. 

Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

And this is what I get with lsblk

NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT

sda      8:0    0 232.9G  0 disk 

├─sda1   8:1    0   229G  0 part /

├─sda2   8:2    0     1K  0 part 

└─sda5   8:5    0   3.9G  0 part [SWAP]

Result for sudo fdisk -l

Disk /dev/sda: 250.1 GB, 250059350016 bytes

255 heads, 63 sectors/track, 30401 cylinders, total 488397168 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00042ebd



   Device Boot      Start         End      Blocks   Id  System

/dev/sda1   *        2048   480237567   240117760   83  Linux

/dev/sda2       480239614   488396799     4078593    5  Extended

/dev/sda5       480239616   488396799     4078592   82  Linux swap / Solaris

Do you have any ideea what is happening to my drive?