Error message when deleting folders/files on Maintenance mode I turn the site in maintenance mode for update Drupal Core from 7.30 to 7.32. I follow the step on Drupal docmentation to delete all folders and files, beside "site" folder(on step 5). However, I got the error message and warning about missing files. I dont think that how maintenace mode should be. What am i missing?

PS:
1. the site does show in maintenance mode before I delete all the folders and files(beside site folder)
2. Site back to normal after copying v7.32 folders and files(beside site folder)
Rather than the two step deleting the folders and then uploading the new ones, I would recommend just copying over the old ones with new ones. You'll probably have to tell your FTP program to overwrite but when I upgrade in this fashion, I select all the files and directories except for sites folder and push them to the server.

When possible, I use the Drush tool via a terminal window as it is a much quicker and easier solution.