My lenovo G570 is asking for hardrive security sata port 0 hitachi password can u help me? if u can help i will post the hitachi no ......

that may be a virus/.

shut the computer off cold with power button, wait 20 seconds and restart it.

something has locked the hardrive

Sorry, you're hosed. If you forgot your HDD password the only thing you can do is replace the drive and rebuild your S110. There is no way to remove or reset it without using the original password in the original motherboard. Period.
If you're misinterpreting the screen information and it happens to be the bios user password that's forgotten it is possible to have an authorized Lenovo repair center reset it with adequate proof of ownership. Lenovo themselves will not do it. If it's the SVP password for the bios the only solution is to replace the motherboard. Period.

Having passwords that can be reset like in the old days just by jumpering 2 wires defeats the purpose of having a password in the first place.

I will recommend to talk to the shopkeeper or the online site from where you have ordered your computer to resolve your problem if you have ordered it online then I will recommend to talk and call on the company number they provide help in the footer contact us link if you click that link it will redirect you to contact us page where you can talk to the company help and resolve your issue or else you can check on the header for the contact us page

Depending on Make and Model if you remove the Battery from the motherboard for 20-30 seconds to be safe, it will reset the board and release any BIOS password and restore it to factory default. This doesn't always work especially on Lenovo laptops you would have to contact IBM/Lenovo

These WEB sites may help unlocking the hard drive password.
HARD DRIVE PASSWORD UNLOCKING - Purchase
http://www.hddunlock.com/purchase/ A-FF HDD Unlock Wizard (HDD Password unlocking - Free)
http://www.hddunlock.com/download/

i forgot my lenovo g570 bios pasword. can any one help me to define how to crack this pass word?

You can reset Lenovo laptop password with Smartkey Windows Password Recovery, and see the detail direction from http://www.recoverlostpassword.com/products/windowspasswordrecovery.html

This is a "security" feature, to protect the files on the disk-drive from unauthorized access.

The computer supports "full-disk" encryption of each disk-drive inside your computer.

So, what password did you set when you first initialized this disk-drive?

If you don't know it, there's nothing you can do -- all the files on the disk-drive are _NOT_ accessible to you.