Lexar Image Rescue 2.0 - Manual (Page 4)

New Features Since Version 1.x
Image Rescue 2.0 offers several significant improvements and enhancements
over the previous versions including:
• Support for all flash memory form factors from any supplier
• Support for any mass storage class reader including high speed USB 2.0
and FireWire readers resulting in a significant performance improvement
• Support for FAT32 formatting of cards larger than 2 GB
• 3 different recovery modes
• Recovering all types of files, not just images
(High Level Search recovery mode only)
• Testing and automatically repairing file system errors
• Defragmenting your card
• Updating firmware in certain Lexar USB-enabled CompactFlash cards
• Improved usability and interface
Memory Card Basics
If you have lost an image and need to recover the data on a card, it's important
to immediately stop using it in a camera, and run Image Rescue 2.0 to recover it.
In most cases, the actual data has not actually been lost until it has been
overwritten. The more you continue to use a card after you realize you need to
recover data on it, the more likely it is that the data will be overwritten and you
will not be able to recover the lost files.
Data is written to cards in random locations. If you only fill a card up half way
before you download and delete images you will not always use the same sectors
on the card (e.g. the first 256MB of a 512MB card). Every time you delete files or
reformat the card, the file system is updated to show the previously used
sections of memory to be free and can be overwritten when needed.
In the case of image files, partial images may remain on your card even after
it's been formatted. This occurs only when the deleted files have not been fully
overwritten with new information. Therefore, when you perform an extensive
search in Image Recovery mode, partial images may be recovered.
The Secure Erase feature of Image Rescue 2.0 actually overwrites every sector
on the card with fixed pattern of 1’s or 0’s and then reformats the card clean.
Since all of the sectors in the card have been overwritten, it is impossible to
retrieve any data from the card after a Secure Erase.
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