How to remove password from your Hard Disk ?

Do search with Bing for atapwd or “ata password” its part of the new ATA spec. You can enter a “master password” that will remove the “user password” that has be setup on the drive. This master password is manufacturer specific. So search your hard drive manufacturers website for Bing around for a list of master passwords. Remember you CAN lock out your drive. This is bad. You can always remove the password without the master password but when you do it using that method the drive will be wiped. So the only way to solve this is to find a master password or try and work out what user password was set on the hard drive.

To try out Master password for unlocking your HD you need to have Ultimate boot CD and  can use “mhdd” utility  included in that CD , it is easy and work well.

1) Download Ultimate Boot CD(http://ubcd.sourcefo…t/download.html)

2) Burn it into a Disc and boot it up.

(Use ISO burner. If using windows 7, right click the file and choose “Burn Disc Image”)

3) On main menu, choose “HDD” > “Diagnostic” > “MHDD v4.6”

4) You will see a list of harddisk, select a harddisk you want to unlock

5) Type “unlock” and reply “1” for master password

6) Enter the master password.
(If it is wrongERR will turns red on the top of the screen, and You have 4 more tries before it powercycle the disk)

7) If it is correct, type “DISPWD” and reply “1”
(There will be a warning if your disk is still locked)

8) Retype the master password again and your disk is unlocked!
(ERR will turn red if the password wrong)

9) Type exit and press “ctrl + alt+ del” to reboot your computer

*After step 3 (on “MHDD v4.6” menu), type “help” to get a list of commands and its function
**If master password not working, please go to reference site below and look for “maximum security” part.

————————-Help for Master password———————————

SEAGATE -> “Seagate” + 25 spaces

series N40P -> “Maxtor INIT SECURITY TEST STEP ” + 1 or + 2 spaces
series N40P -> “Maxtor INIT SECURITY TEST STEP F”
series 541DX -> “Maxtor” + 24 spaces
series Athena (D541X model 2B) and diamondmax80 -> “Maxtor”


FUJITSU -> 32 spaces

SAMSUNG -> “tttttttttttttttttttttttttttttttt” (32 times t)

series DTTA -> “CED79IJUFNATIT” + 18 spaces
series DJNA -> “VON89IJUFSUNAJ” + 18 spaces
series DPTA -> “VON89IJUFSUNAJ” + 18 spaces
series DTLA -> “RAM00IJUFOTSELET” + 16 spaces
series DADA-26480 (6,4gb) -> “BEF89IJUF__AIDACA” + 15 spaces

HITACHI series DK23AA, DK23BA and DK23CA -> 32 spaces

TOSHIBA -> 32 spaces


If your problem is when you boot your computer then BIOS password may be enabled. If the BIOS password was also set on the original computer you can always remove the RTC battery(i.e. Your CMOS Battery) from the motherboard and mains power from the system to wipe the BIOS password. This only works on PCs and a lot of new laptops use an EEPROM to store the password so you need to short that chip. That’s another story all together.

Image of CMOS Battery

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  3. Ratheesh KP

    method#1 – I did everything as mentioned but when i restarted after step 9 the drive still asking for a password.

    master password is 11 times WDC you’ve typed it wrong.

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  5. Escalante

    Hi im having a problem, I can´t advance from the step 5. it just drops a message that says “Drive is not ready” and “busy” keeps green.

  6. shahnawaz

    Can u tell me How can i reset/unlock my hdd password of seagate model-ST910021AS (100 GB size) …..I am using Win7 OS. Immediate response wud be highly appreciated…

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