On 7/4/07, Lynn David Newton <lynn.newton@gmail.com> wrote:
Have you tried using gzip from the command line? What
does this tell you?

  gunzip mydbarchivename.gz

(Substituting the name of your archive. We hope it says
nothing.)

What command are you using to restore the database?

What error message are you getting when you do it?

Is the mysql archive made with mysqldump or is it an
actual backup of the database data directory? If the
latter you may be seriously hosed.

Need more information to help you.

Along with Lynn's recommendations, how is it being backed up?  Do you have cron calling a script?
If so, please list the cron commands and the script.