Two nights ago I discovered that my blog was redirecting to the install page after having been installed and running for months. Taking this as an opportunity to upgrade to 2.6 I uploaded the files and ran the upgrade file. I was informed I needed up to upgrade my WordPress database. A whole host of error messages appeared stating, WordPress database error: [Can't open file: 'wp_options.MYI' (errno: 145)].
I have logged into phpmydmin and i get a similar error when i try to view the structure of the options table. The site now redirects to the install screen again.
Please help.