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Drive Lock Password for Hitachi HD in HP Pavilion zv5466ea notebook

Have removed the HD from my notebook, and put the same HD in again. And now the computer asks for a drive lock password.
I have NEVER set this password (didn't know it existed).
Have tried to call HP support, but they couldn't help me. Said there's nothing else to do, than bying another HD.
The HD is a Hitachi ic25n080atmr04-0 and my computer is a HP Pavilion zv5466ea.
Can anyone help me?

Posted by Anna Nielsen on

  • Anna Nielsen Jul 05, 2008

    Just one question: You wrote "3 In case of laptop:...".

    It is a laptop. How can I read out the password from the chip of the laptopmotherboard?

  • geowolf Jul 20, 2008

    hd locked 40 gig laptop harddrive



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Probably a little bit late but I think I found a solution ...

1.pull the hard drive out of the laptop
2.boot computer into bios settings
3. set a new bios password and check lock computer
4.while the computer is on slide the HDD in the laptop again.
5. save and exit bios
6.fortunately in the next boot you will get your hdd back

Posted on Jan 16, 2010



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  • 63 Answers

This is called a ATA-password. Also known as HDD Password, HDP, Security lock, HDD Security feature. It is a standard included in the ATA Specification. (read the ata-spec) If a drive is locked it (to be precise the controller on drive pcb) will reject all read/write operations and some other operations. Thus it is impossible to use any software-tools to read/whipe the password.

It IS possible to unlock the drive using extra hardware. This hardwarecan READ OUT the password in cleartext (as i understand). Visit for proof.

There are however other way's:
1 Brute force the lock
2 hack firmware
3 in case of laptop: read out the password from the chip of the laptopmotherboard.
4 buy the required hardware yourself: very expensive. Vogon charges30,000 pounds!

So buy a new drive!!

Posted on Jul 05, 2008

  • Anonymous Jul 06, 2008

    it is so hard I really would not recommend setting out to try it.

    On laptops, the password is usually stored in an eeprom on the motherboard,

    you need an eeprom programmer (electronic device) to retrieve it.

    Acer 630: eeprom 93c56 ?

    Compaq M700: eeprom 24C02

    Dell Inspirion 7500: eeprom 24c164

    Dell Inspirion 8100: eeprom 24c02

    Dell Latitude C600: eeprom 24c02, password in scan code at 0x00, 0x10 and 0x90

    Dell Latitude CPI: eeprom 24c02, password in scan code at 0x00, 0x10, 0x80

    IBM Thinkpad X20: eeprom 24RFC08CN, password in scan code at 0x338

    IBM TP 380Z: eeprom 24c01, password in scan code at 0x38 and 0x40

    IBM TP 390: eeprom 24c03 (be carrefull, there are two eeprom)

    IBM TP 560X: eeprom 24c01, password in scan code at 0x38 and 0x40

    IBM TP 570: eeprom ?, password in scan code at 0x338 and 0x3B8.

    IBM TP 755CX,760C,765D: eeprom 93c46, password in scan code at 0x38 and 0x40

    IBM TP 770: eeprom 24c01

    IBM TP 600E, T21, T23: 14 PIN 24RF08

    IBM TP T20: 24RF08, password in scan code at 0x338 and 0x3B8

    HP Omnibook 2100,4150,7150: eeprom AT24c164, 0x6D-0x7F area, unknow algo

    put a 00 at 0x7F to clear admin password

    HP Omnibook 6000: eeprom 24c08 or 24c164 0x50-0xBF area

    (maybe 0x50-0x6F only), unknow algo

    HP Omnibook 6100: eeprom 24c08

    HP Omnibook XE3: eeprom 24c16

    HP Omnibook 770x: eeprom 24c01

    Sony pcg-fx950: eeprom 93c46 ?

    Toshiba 74600C: eeprom 93c56

    You can get/buy eeprom programmer in electronic shops or labs, you need

    another PC to use it.



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How to Reset HP Pavilion Password on Notebook Computer


Pavilion BIOS password reset is commonly needed. Today, we talk about HP Pavilion Windows password reset solutions. Our Windows OS users can set up administrator account and encrypt it with password to enter the OS. This actually prevents unauthorized users from operating on your system. While, if we Pavilion PC users forget the encrypted password and can't login Windows, now what to do for HP Pavilion password reset?

Firstly, if there are not important files on our HP Pavilion notebook, we can reinstall system by deleting all data and cleaning system. Most of us may hope opt for other ways to bypass the Pavilion login password.

Secondly, please think that is there still another account for us to enter Pavilion PC. In Windows XP, Vista, there is HP Pavilion default administrator which has blank password. For Windows 7, the built-in administrator account is disable defaulted. Only if we set it as enable, the account can be used at the moment.
Take HP Pavilion Windows XP password reset from Safe Mode as example:
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c. Click "Administrator" on the Windows login screen.
Note that if we have set this HP Pavilion administrator password, we need to input the password instead of leaving "Password" field blank.
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Thirdly, the least troublesome solution on Pavilion password recovery is to opt for password reset program tool. With the program and a CD/DVD/USB disk, we can easily remove the password for locked computer. Take Windows Password Recovery Corporation as example:
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Step2. Set locked computer to boot from CD/DVD/USB Flash Drive;
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Certainly that the 3 ways can make sure we reset Pavilion password finally. The Windows Password Recovery Corporation can be used for Windows 7, XP, Vista, and Windows Server 2003, 2008 domain password, etc.


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