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From: John John - MVP on 29 Mar 2010 07:17
The files will be unrecoverable with a single pass.
> But it seems that DBAN can not wipe the disk using 35 passes as file
> shredder does. How many passes can DBAN erase?
> "Paul" <nospam(a)needed.com> ??????:hopgn1$h3q$1(a)speranza.aioe.org...
>> �� wrote:
>>> Hi, I'd like to use file shredder to overwrite the primary partition C:,
>>> it failed for the partition is in use. What can I do? Can I install
>>> system on another parition such as E or F, and then boot from E or F
>>> partition, so that I can overwrite the ex-primary partition using file
>>> Please help me. thanks.
>> If you need to erase your entire drive, OS and all, try DBAN.
>> DBAN will erase *all* connected drives, so use it with care. In the
>> DBAN forums, there were a few reports of clever people, who managed
>> to erase their connected "backup" drive. DBAN can erase up to 100
>> connected hard drives, at the same time.
>> If you want something with a little more precision, you can boot
>> a Linux LiveCD, and erase a partition with "dd". For example,
>> if I booted Ubuntu and did something like this.
>> sudo dd if=/dev/zero of=/dev/hda1
>> and let it run to completion, that would write zeros over the partition
>> named "hda1". It helps, if your partitions all have labels assigned.
>> Or if you have unique files at the top level of your partition, that
>> may make it easier to verify you're erasing the right partition. (I have
>> some files like that on my C: drive, so when I'm in Linux, I have a
>> way to verify I have the right target.)
>> So you don't absolutely need to install another copy of Windows to
>> mess about. (I have a dual boot machine, WinXP on one disk, Win2K on
>> the other, and that is how I get around your current situation, of
>> not having a second OS to use.)
>> Now, the next question is, do you have a way to reinstall the OS
>> on the C: partition ? Don't erase it, if you don't have something
>> to use for recovery.
>> And if you're using some tool which erases the whole disk, you could
>> easily delete your recovery partition as well. So DBAN and Dell, don't
>> Make sure you understand what the tool is going to do, before pulling
>> the trigger. If you had a Dell, and a recovery CD in hand, that would be
>> OK. But if you're one of those people who only has whatever recovery
>> software is in the hidden partition on the hard drive, then using
>> DBAN to erase *everything* on the hard drive, wouldn't be very clever.