We have restored various files from a backup tape from a few years ago. The backup tape was created with a 40/80Gb Compaq DLT Tape drive. The Operating system in use at the time of the backup was Novell Netware 5.0. The backup software in use was Arcserve IT (version 6.0)
The files have been restored successfully to a Windows 2003 Server environment, however upon trying to open a variety of files, they do not successfuly open. Microsoft Excel files give an error message of "The File is not recognised". An attempt to open PDFs, JPGs result in errors as well. Word Documents result in Word prompting to decode the file from a list of languages.
A different backup tape from a similar period has also had files restored from it, resulting in the same error messages when trying to open the aforementioned restored files.
Can anyone shed some light as to what is happening, why it is happening and any possible solutions to retrieve the data