1 of my HD partition suddenly can't mount and want me to initialize! HELP!!

Question

Hi,
If anyone who frequented these kind of problems before please let me know your solutions solving these problems. Thanks very much!!
I'm a musician and a frequent mac user,I have a Power Mac G4 dual 800 with 1.25GMhz ram running on Mac Os 9.21 but with Mac OS X installed (I need to use Mac OS classic due to some of my music softwares still need to be updated before I upgrade to OS X),I've put the Hard Disk in 2 other sub partition HD at the beginning and have been using it to put all my important audio files and songs files. No problems at all before these nightmare started!
The serious problem I'm having now is I suddenly can't mount one of my partition HD anymore.
-I heard weird sound when starting & re-starting the Mac. (Heard some Hard Disk weird sound like sound "crutch" sound" and since the partition can't be mounted, the first thing shows up after I boot the computer is asking me if I wanna Initialize the Hard Disk because it's unreadable. There is 2 choices for me "Cancel" & "Initialize" But there is no effect when I choose "Cancel" so I use the Force Quit.
2 little message saying my Main Hard Disk & the other partition are damaged but they still showing up properly and still running dangerously I think.
-I have tried to start-up by using the installer Disk came with the computer and runs the First Aid Kit to verify the disk. I can see the partition and can see the icon of it but it's just different from others (in a black tone basic classic icon) and after running the verification some following messages appears:
"Mountcheck found serious errors" (in red) then "Overlapped extent allocation,2.60" (in red) and "Hard disk need to be repaired" so I run the Repair mode and it just can't fix because it says it's not been mounted.
I've also checked the main HD and the other partition which sometimes had some problems with it but no problems been found.
-There was few times my computer do Freeze or appears a Bomb asking me to restart when I recording something using the partition for saving the data and a weird sound of hard disk comes before freezing. It seems it's always the same place of the hard disk. Also When I inserted a blank CD-R disk into the drive it just freeze and appears a Bomb message instead asking me if I wanna use the Toast or i-tunes for preparing the disk which I always used to do.
I really hope the computer can hang on just for 1 more month before I have a break to fix everything and backup everything inside or initialize everything inside.
P.S. I've another Powerbook G4 running on OS Tiger but it's mainly for my internet use. ( I don't use internet connection for my PowerMac G4)
And the Combo super Drive is DOWN,I just can't insert any Disk inside anymore. So if having another Mac is helpful for my issue,anything I would try.
Due To I'm having some urgent important jobs now so I really can't initialize or setup other new computers for my works now.
HELP! Thanks!!!

Answer 1

Just because you can't find them does not mean they aren't there.
Freeing Up Space on The Hard Drive
  1. See Lion/Mountain Lion/Mavericks' Storage Display.
  2. You can remove data from your Home folder except for the /Home/Library/ folder.
  3. Visit The XLab FAQs and read the FAQ on freeing up space on your hard drive.
  4. Also see Freeing space on your Mac OS X startup disk.
  5. See Where did my Disk Space go?.
  6. See The Storage Display.
You must Empty the Trash in order to recover the space they occupied on the hard drive.
You should consider replacing the drive with a larger one. Check out OWC for drives, tutorials, and toolkits.
Try using OmniDiskSweeper 1.8 or GrandPerspective to search your drive for large files and where they are located.