USB Data recovery Toronto
USB, DVD, CD, Zip, Jaz Recovery

Data Recovery from removable storage devices is required due to one of two main problems:

1. LOGICAL PROBLEMS - In these situations the removable storage device is undamaged and still operational. The data files cannot be accessed because the indexes used by the file system to locate the data have been damaged or overwritten. This may result from various scenarios and for more examples please see our Hard Drive Data Recovery section.
    
2. PHYSICAL ISSUES - The removable floppy, CD, DVD, ZIP, Jaz or USB flash drive is NOT operating properly or has become damaged. Physical issues are quite different between the various storage devices but may include:

   Bad Printed Circuit Board	Dropped or Knocked over	Media Scratched
   Unreadable Sectors	Storm Power Outage Damage	Defective Memory chip
   Broken Connector	Electronics Defective	Damaged Casing
   Clicking Grinding Noise	Fire, Flood, Water Damage	Physical damage
   Excessive heat	Cold to Hot Condensation	Spin motor bad
   Media aging	Servo positioning track bad	System Area corrupt
   Won't spin up	Humming Vibration Issues	Crushed, bent or warped

If the problem has been determined to be a LOGICAL issue, we first use specialized imaging software to create an exact image of every readable byte of data from the removable media. As with all our recoveries, once an image is secured, we never access the original device again, preferring to work on a copy thus preserving the original media. Logical issues are resolved by careful analysis to determine exactly what went wrong. Damaged and overwritten file system structures are rebuilt manually or using special utilities. In most cases, whether the result of read errors, re-formatting or deleting files, we will be able to repair or rebuild the necessary file system structure in order to access your data. When you delete or reformat your storage device, the file system basically re-writes the tables or indexes that define where the files are stored BUT the actual file contents will remain untouched.

PHYSICAL issues with spinning removable media like floppy diskettes, Zip & Jaz cartridges, and CD/DVD media are related to ONE factor: the condition of the media. Because we are dealing with only one component of the storage system, there are no electronics or mechanical issues getting in the way with our reading of the data. If a sector of data cannot be read, it is because of physical damage or electrical/magnetic damage to the disk media. Besides cleaning and polishing the damaged areas, there are only a few other methods of reading physically damaged media. We can adjust the amplitude of the read signal coming from the heads which may allow us to read a few more sectors. And if we have sectors with ECC read errors we can use ECC error normalization techniques where we read the sectors thousands of times and create the most likely data from those bits that appear most often.

PHYSICAL issues with USB Flash Sticks are much more complicated. In these cases we must remove the memory chip(s) physically from the flash device and read them individually OR we must source and replace the devices controller chip or IC (integrated component).  We then analyze and reconstruct the data to a useable form in much the same manner as we handle SSD or Solid State Drives. The schemes used inside by each device's controller to manage the flash memory are very unique and complicated. The controller attempts to equalize the writing of data across all the data cells and at the same time avoid using the cells previously found defective. To put the pieces of the data back together we must determine the ordering of the data cells to ensure we use the most current data. Remember to call Memofix for all your DVD/JAZ/USB data recovery in Toronto needs.