Hi all.

It is a second WD hdd that was not in use for ages, but connected to the motherboard.

First it showed a few bad sectors in starup time but was workigng normally, then i rebooted the PC and it had a lot of unreadable segments. After the reboot Windows would recognize the HD but not read its contents.

Then i started chdisk, but while it was trying to recover the hard rive, the PC turned off out of nothing.
Now windows won't recognize the hdd or will recognize as a CD-Drive, right now it is recognized but as a CD-Drive.

Anything i can do???

There are lots of files there that are really important to me

Probably that wasn't too bad, as these two statements
hardly correlate to each other.

Depending on the time it was "working", it could have happened that checkdisk destroyed more data than the hard drive failure.

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• Remote RAID, NAS, SAN, VMware, DVR (CCTV), flash and tape recovery. Data recovery support.

I rebooted the PC again and the hard drive was recognized during startup(chdisk tried to repair it but i canceled the attempt following your advice), now Windows still display the CD-Drive icon but when i click over it, it says "E:\ is not readable. The file or directory is corrupted and unreadable."

SeaTools is also now recognizing the hard drive but i'm afraid of making any test or anything, i don't know what to do

Update: I'm managing to recover files with Recuva but it is very slow and the drive makes a weird noise. Should i continue?

my advice would be to stop what you doing and send it to a pro
it might be still not an expensive recovery
my 2 ¢