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Operating Systems Linux recover deleted files from memory stick Post 88525 by mr_manny on Saturday 5th of November 2005 12:22:20 PM
Old 11-05-2005
found these OLD notes on a process I successfully used ONCE.

hope it helps,
manny

Pretty much most of the answers have been for users of Win32 operating systems, so I'll post a little note here about howto recover corrupted JPEG files from compact flash here for Linux or UNIX users.

Step 1: load the CF card as a read-only filesystem. A number of options exist. Linux, for example, supports many cameras through the usb-storage.o driver. You simpy connect the USB cable from the workstation to the camera, turn on the camera, and then try to mount the CF card as a filesystem. The usb-storage.o driver will usually use SCSI emulation and present the drive as /dev/sda1 or some number. On Linux 2.4.x kernels, look in the /var/log/messages file for a line containing "kernel: sda: sda1" or something similar.

For laptop users, one may still connect using USB on newer laptops, but more commonly, one uses a PCMCIA adaptor card for CF. These are relatively cheap - around $14 in 2002 when I bought them. The CF card slides into the PCMCIA adapter and the whole unit pops into the laptop. If audio notifications on the PCMCIA driver were enabled, one should hear two positive "beeps". This means that the CF card should now be recognized as drive /dev/hde1 (again, see messages file for actual device name)

Step 2: Mount the filesystem read-only at first and just do a directory listing to see if Linux recognizes files that the camera or plain win32 won't see. This can be done by creating the mount point and mounting the filesystem:

# mkdir /mnt/cflash # mount -t vfab -o ro /dev/hde1 /mnt/cflash

Step 3: If the images are present and can be copied to disk, do so at this point and finish. Otherwise, we'll need to do a full filesystem dump of contents into a file and then run a jpeg extraction utility to parse and extract jpeg files for the flash image on disk. To do the dump on UNIX, use the 'dd' command.

# dd flash.img

This should produce a dump of the entire contents of the flash ram to disk file.

Step 4: The final step requires one to download a DOS utility called "jpegdump" found at http://www.goto.onlinehome.de/dsc/jpegdump.htm and then running it under the Linux Wine (Windoze Emulator) utility.

# wine -- jpegdump -recover flash.img

In the currect working directory, the jpegdump extracts out a large number of ordered JPG files. I hope this helps. And Linux rocks. The 'dd' utility combined with Wine running jpegdump in emulation works beautifully. I was able to recover all 32 MB of stored JPEGs

recovered with following:

wine -- jpegdump.exe -recover c:\dianesPICSdd.img


this created recoverred jpg files under the wine windows directory...
 

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digikam(1)							   User Commands							digikam(1)

NAME
digikam - digital photo management application for KDE SYNOPSIS
digikam [Qt-options] [KDE-options] [--detect-camera] DESCRIPTION
Digikam is an easy to use and powerful digital photo management application, which makes importing, organizing and editing digital photos a "snap". An easy to use interface is provided to connect to your digital camera, preview the images and download and/or delete them. Digikams buildin image editor makes the common photo correction a simple task. The image editor is extensible via plugins. The digikam package contains already many useful image editor plugins. Digikam can also make use of the KIPI image handling plugins to extend it's capabilities even further for photo manipulations, im- and export, etc. The kipi-plugins package contains many very useful extentions. Options: --detect-camera Automatically detect and open picture download dialog. Note: autodetection does not work with cameras that claim to be USB mass storage devices. --download-from <path> Open camera dialog at <path>. Use this with cameras that export their pictures as USB mass storage. KDE automounts the camera stor- age, if the path given as, e.g., system:/media/<dir> or media:/<dir> Generic options: --help Show help about options --help-qt Show Qt specific options --help-kde Show KDE specific options --help-all Show all options --author Show author information -v, --version Show version information --license Show license information -- End of options SEE ALSO
The full documentation for digikam is maintained as a html manual in the package digikam-doc. The command khelpcenter help:/digikam gives you access to the complete manual. AUTHOR
digikam was written by Renchi Raju and many others (see /usr/share/doc/digikam/AUTHORS for details). This manual page was prepared by Achim Bohnet <ach@mpe.mpg.de> for the Debian GNU/Linux system (but may be used by others). digikam 0.7.4 Feb 2005 digikam(1)
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