How to Erase Data from HDD

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Hello i am going to sell my HDD so just wanted to make sure that there are no Data on my HDD.
Please advise whether just Formatting the Drive will be sufficient or i have to do anything else to be sure ?

Formatting doesn't delete files form HDD. Use application like Eraser for completely wiping a HDD.

There are several methods to do this

1. Low Level Formatting
2. Use CCleaner to Drive Wipe
3. Use Eraser

get this and make a bootable CD with DBAN. SHould be enough for your purpose :
DBAN Download | Darik's Boot And Nuke

DBAN offers may erase algorithms to choose from. It's text based though and has one dangerous quick command named 'autonuke'. This will simply hit wipe simultaneously on all detected HDDs in your system. Run this tool in interactive mode and carefully select the HDD to be wiped. since this tool offers boot disk, disconnect any live HDDs from your PC and operate with only the HDD to be wiped.

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Thanks to everybody for replying. Just one question will these tools wipe everything including the OS i am currently?

baban4u said:
Thanks to everybody for replying. Just one question will these tools wipe everything including the OS i am currently?

EVERYTHING IN THE HDD WILL BE WIPED.

That means OS too.

baban4u said:
Thanks to everybody for replying. Just one question will these tools wipe everything including the OS i am currently?

You can select the partitions that you want to operate on.

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harshilsharma63 said:
You can select the partitions that you want to operate on.

should i run the application with a disk in my PC?

will these tools wipe everything including the OS i am currently?

It also depends on how the HDD and tool is used. If you run the tool from within the OS on the same HDD to be wiped, then it may not be able to lock the system partition and could exclude OS partition. If the HDD is attached as a second drive in a PC or if the tool is run when booted from & off a separate boot disk it shall wipe OS partition too.

Boot n Nuke method

Darik's Boot And Nuke | Hard Drive Disk Wipe and Data Clearing