Flash disks have become ubiquitous media for everything from computer data, mp3 players and digital cameras. It has replaced the floppy disk as means to carry data around. Flash disks are solid-state devices and, therefore, have no moving parts. Plugging it into the USB drive, the flash drive is automatically recognized by the computer without any need of installing additional software. With expected lifetime measured in hundreds of thousands of write-erase cycles, flash drives are expected to last up to 10 years. That’s more than twice that of a hard disk.
Flash disk portability however leads to a higher probability of damage due to environmental factors. Aside from the regular causes of drive failure, flash drives could get wet in the rain, the casing could shatter when it is accidentally dropped, or it could be damaged while inside the camera.
The difference in data storage between a flash drive and a regular hard drive or a floppy is due to the data residing on a chip. This allows for a truly random access across the whole media. In fact, the disk access algorithm makes sure that the data is spread evenly among data sectors with the use of “wear leveling algorithm.” The flash disk has a finite number of write or erase cycles. If it were to keep on writing to a particular sector, that sector would literally wear out from use much earlier than the other sectors. The wear leveling algorithm ensures that the sectors wear out evenly. And also because of the wear leveling algorithm, when a data sector wears out, the rest of the disk is sure to quickly follow.
In some instances, the camera cannot distinguish between the file system on the flash disk and force a format. Early flash disks used FAT12 or FAT16. FAT32 is used by current generation large capacity flash disks. If the digital camera fails to detect the flash drive’s capacity it might wrap around data while writing the photo and over-write system areas.
There are times the flash disk could not be read by the computer. Though attributed to the computer, this is an error caused by the camera or MP3 player OS. Unplugging the drive while it’s writing data may also cause a corrupted flash drive.
In case of lost
In some cases,