The IO subsystem corrupted your database when the machine crashed. Error 824 is that a page checksum failure occured - a page's contents were altered AFTER it had been written out by SQL Server. Could be a torn page (partial write when the machine crashed) or something more insidious in the IO subsystem.

So - your database is corrupt and recovery cannot complete. This means the database is transactionally (and possibly structurally inconsistent) and so is in the suspect state (which means the recovery has started but not completed). You have two options: restore from your backups, or put the database into emergency mode and run emergency mode repair. Take a look at my blog in the Disaster Recovery category for guidance about emergency mode repair and the effect it will have on your database. I recommend the backup route if you have it available to you.

You should also figure out why the IO subsystem corrupted the page - just to make sure that's what you'd possibly expect in a machine crash situation on this machine.

Hope this helps