Transferring recorded material from the original media should never be done using a simple file copy. There are different software and hardware solutions available that will copy a file to one or several destinations and perform a checksum calculation, comparing the material on the original media to the copies, to provide a minimum effort safety check of data integrity. We strongly recommend using copy software and tools with checksum calculation and verification. Checksum files should be calculated and generated as sidecard files at the first copy process.
There are many different types of checksums, which are all meant for the same:
Safe and fast copy at the same time.
For example, there’s a checksum file called ‘MHL (Media Hash List)’. The structure of the file is fixed. It’s an XML based file which always contains the following information:
- creator info
- start date
- finishing date
- Path to file
- filesize in bytes
- last modification of the file
- xxhash (calculated)