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Windows 7: New System with Old Hard-drive. Seeking advice.

29 Sep 2011   #11
Ferenth

Windows 7 64 bit
 
 

Awesome. Great advice again. Thanks for the links as well theog and gregrocker.

I think I have one final question. What are the physical differences between using diskpart clean all where it writes 0's to the hard-drive and deleting the current partitions (I have technically 2: 99% of the HD space and the System reserved) through windows installer and then saying: format my hard-drive so windows can install "cleanly".

More directly, what does windows actually do when it deletes the partition...does it just delete pointers (I have some level of how hard-drives work and I'm curious exactly what happens)?

Thanks again folks!!


My System SpecsSystem Spec
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30 Sep 2011   #12
nickyoung

Windows 7 Ultimate x32
 
 

Writing 0's over the surface is called a "pass". You can use a third party utility to basically ensure no old data can be recovered from a disk by making several passes over the surface of the disk.

For the sake of simplicity, deleting a partition during windows setup, creating a new one, and then doing a full format of that partition generally erases everything on the drive. (If given the option do a full format after recreating the partition).

How well windows does a pass / format of your drive - debatable I guess...but it works just fine.
My System SpecsSystem Spec
30 Sep 2011   #13
rraod

MS Windows 7 Ultimate 64-bit SP1
 
 

Here is an excellent article on Disk partitioning from wikipedia...

It should answer most of your questions.

About cleaning the hard disk for security purpose..
There are various methods.

I am not well versed with diskpart.exe of Windows 7 OS.
Many utilities do exist for deleting the data securely from a partition.

CCleaner (a free utility.... Not again... free publicity to Piriform .....) is one of them which I use..... It gives options to clean the drive (whole drive or only the free space including MFT free space).

Simple overwrite (1 pass)
Advanced overwrite (3 passes)
Complex overwrite (7 passes)
Very Complex overwrite (35 passes)

One of the options (depending on how much paranoid someone is about his/her sensitive data - no pun intended) should do the trick.

Another excellent article on Data erasure methods and standards on wikipedia to satisfy your curiosity.
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 New System with Old Hard-drive. Seeking advice.




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