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rated 0 times [  1] [ 0]  / answers: 1 / hits: 4341  / 1 Year ago, sat, december 17, 2022, 4:32:43

I have a problem with my usb flash disk. It's a Kingston Datatraveler. I use it intensely, and since yesterday it has become corrupted. I can't remember that I took it out before dismounting (or safely removing, since I mostly use it on a Win7 - VM Ubuntu machine), but that seems to be the most likely cause.



I searched and searched, but it seems everyone gives up eventually on trying to rescue data in this situation. However, I'm stubborn and I need your help.



These are the diagnostics that I did so far:



walle@earth:~$ sudo fdisk -l /dev/sdb 
walle@earth:~$ sudo fdisk -l

Disk /dev/sda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders, total 41943040 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: 0x0009a95f

Device Boot Start End Blocks Id System
/dev/sda1 * 2046 41943039 20970497 5 Extended
/dev/sda5 2048 6000639 2999296 82 Linux swap / Solaris
/dev/sda6 6002688 41943039 17970176 83 Linux
walle@earth:~$ lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 002: ID 80ee:0021 VirtualBox USB Tablet
Bus 001 Device 006: ID 0c76:0005 JMTek, LLC. Transcend Flash disk
walle@earth:~$ ls -laR /dev/disk
/dev/disk:
total 0
drwxr-xr-x 5 root root 100 Sep 21 12:22 .
drwxr-xr-x 16 root root 4180 Sep 21 12:22 ..
drwxr-xr-x 2 root root 240 Sep 21 12:22 by-id
drwxr-xr-x 2 root root 160 Sep 21 12:22 by-path
drwxr-xr-x 2 root root 80 Sep 21 12:22 by-uuid

/dev/disk/by-id:
total 0
drwxr-xr-x 2 root root 240 Sep 21 12:22 .
drwxr-xr-x 5 root root 100 Sep 21 12:22 ..
lrwxrwxrwx 1 root root 9 Sep 21 11:08 ata-VBOX_CD-ROM_VB0-01f003f6 -> ../../sr0
lrwxrwxrwx 1 root root 9 Sep 21 11:29 ata-VBOX_HARDDISK_VB0f06d815-0d4e855f -> ../../sda
lrwxrwxrwx 1 root root 10 Sep 21 11:28 ata-VBOX_HARDDISK_VB0f06d815-0d4e855f-part1 -> ../../sda1
lrwxrwxrwx 1 root root 10 Sep 21 11:08 ata-VBOX_HARDDISK_VB0f06d815-0d4e855f-part5 -> ../../sda5
lrwxrwxrwx 1 root root 10 Sep 21 11:08 ata-VBOX_HARDDISK_VB0f06d815-0d4e855f-part6 -> ../../sda6
lrwxrwxrwx 1 root root 9 Sep 21 11:29 scsi-SATA_VBOX_HARDDISK_VB0f06d815-0d4e855f -> ../../sda
lrwxrwxrwx 1 root root 10 Sep 21 11:28 scsi-SATA_VBOX_HARDDISK_VB0f06d815-0d4e855f-part1 -> ../../sda1
lrwxrwxrwx 1 root root 10 Sep 21 11:08 scsi-SATA_VBOX_HARDDISK_VB0f06d815-0d4e855f-part5 -> ../../sda5
lrwxrwxrwx 1 root root 10 Sep 21 11:08 scsi-SATA_VBOX_HARDDISK_VB0f06d815-0d4e855f-part6 -> ../../sda6
lrwxrwxrwx 1 root root 9 Sep 21 12:07 usb-GENERIC_USB_Mass_Storage-0:0 -> ../../sdb

/dev/disk/by-path:
total 0
drwxr-xr-x 2 root root 160 Sep 21 12:22 .
drwxr-xr-x 5 root root 100 Sep 21 12:22 ..
lrwxrwxrwx 1 root root 9 Sep 21 11:08 pci-0000:00:01.1-scsi-0:0:0:0 -> ../../sr0
lrwxrwxrwx 1 root root 9 Sep 21 12:07 pci-0000:00:0b.0-usb-0:1:1.0-scsi-0:0:0:0 -> ../../sdb
lrwxrwxrwx 1 root root 9 Sep 21 11:29 pci-0000:00:0d.0-scsi-1:0:0:0 -> ../../sda
lrwxrwxrwx 1 root root 10 Sep 21 11:28 pci-0000:00:0d.0-scsi-1:0:0:0-part1 -> ../../sda1
lrwxrwxrwx 1 root root 10 Sep 21 11:08 pci-0000:00:0d.0-scsi-1:0:0:0-part5 -> ../../sda5
lrwxrwxrwx 1 root root 10 Sep 21 11:08 pci-0000:00:0d.0-scsi-1:0:0:0-part6 -> ../../sda6

/dev/disk/by-uuid:
total 0
drwxr-xr-x 2 root root 80 Sep 21 12:22 .
drwxr-xr-x 5 root root 100 Sep 21 12:22 ..
lrwxrwxrwx 1 root root 10 Sep 21 11:08 1587b411-663d-4b75-93e0-06ed4f76f55c -> ../../sda5
lrwxrwxrwx 1 root root 10 Sep 21 11:08 28c80af8-f546-46ec-9b63-38cbd7c0b9f2 -> ../../sda6


GParted doesn't detect the device, gnome-disk-utility does, but under "Capacity" it says "No media detected".



testdisk doesn't detect it either.



Additionally, the symptoms on Win 7 are that the drive is visible, but not accessible in explorer ("Please insert a disk into Removable disk F:" when trying to browse it, and "Cannot open volume for direct access." when trying to run chkdsk).



My hopes sprang up when I plugged it into a Vista computer: it detects it and can dismount it. I still cannot access anything on there, but when I search for some files by name they show up in results, although I still can't open them.



Please help if you have any idea on how I can recover my data.



Any help would be much appreciated.





More From » usb-drive

 Answers
4

You should try to obtain an image of your drive with



ddrescue Install ddrescue



(see the GNU ddrescue Manual on how to use this tool). Drives should not be mounted. For your machine a command similar to this may be able to create an image of the memory stick:



sudo ddrescue -f -n /dev/sdb /home/earthling/rescue.dd /home/earthling/logfile.dd


After sucess we can now try to recover files from this image without any further damage or risk to the data that still reside untouched on your USB drive.



We may try to repair the filesystem with tools depending on the format we had there (ext4, NTFS, FAT32,...?).



Alternatively photorec from the



testdisk Install testdisk



suite you obviously already had installed may be able to recover individual files (but not filenames) from such an image. See the nice PhotoRec Tutorial for details.



photorec /home/earthling/rescue.dd

[#35409] Sunday, December 18, 2022, 1 Year  [reply] [flag answer]
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