That possibly mean that your HDD is basically got a mechanical fault wich may need replacement. the least you could do now is
-HDD faulty (try another IDE HDD and do a fressh O.S install)
-IDE slot via mainboard faulty (MoBo issue)
-Check if HDD IDE or SATA is enabled from BIOS.
-Could also double check if the HDD cable is OK. (you never know)..
If you can use a spare Harddrive, and boot from it, and if can it read the your origional hdd? (Don’t forget to change the IDE disk jumpers to make it a slave.)
If it can’t see the IDE, then the drive is more than likely unrecoverable…