PS. and I personally would:
- either write a program that scans the partition for known fragments
of the files you want to be gone (perl with Sys::Mmap is an efficient
choice) to verify;
- or backup all good files from the partition, then overwriting the
block device, recreate the partition and co
Why calculate the sizes when you can just use cat until it stops
because the disk is full?
cat /dev/zero > /mnt/yourfilesystem/thebigfile
BTW don't forget to proberly umount /mnt/yourfilesystem afterwards, of
course, to force a sync. (Just in case there might be a file system
that doesn't send t
On 2010-07-16 23:43 +0300, Andrei Popescu wrote:
> On Vi, 16 iul 10, 21:03:42, Andre Majorel wrote:
>
> > perl -e '$bytes = int (1e4 + 1e6 * rand);
> > for $n (1..$bytes) { $noise .= chr (int (rand (256))) }
> > while (print $noise) {}' >/mnt/sdc1/zeros.bin; sync
>
> dd if=/dev/random o
On Vi, 16 iul 10, 21:03:42, Andre Majorel wrote:
>
> If you're feeling paranoid, you could fill with junk instead of
> NULs to protect against any optimisation at filesystem level.
yep, that sure looks like junk
> perl -e '$bytes = int (1e4 + 1e6 * rand);
> for $n (1..$bytes) { $noise .= c
On 2010-07-15 13:55 -0400, H.S. wrote:
> On 15/07/10 01:38 PM, Perry E. Metzger wrote:
>
> > dd if=/dev/zero of=/dev/scd bs=1M
>
> Yes, but that would wipe out everything, the OS as well.
>
> I was looking for just making the already deleted files
> unrecoverable by a casual user. In other words,
On 16/07/10 02:25 PM, Ron Johnson wrote:
Yeah, I guess you could write a bash script to:
1. determine the amount of free space.
2. Divide that by some efficient block size.
3. dd if=/dev/urandom of=${VFAT}/foo.bar \
obs=${BLKSIZ} count=${BLKCNT}
Coincidentally, that is exactly what I did (but
On 16/07/10 02:03 PM, Mark wrote:
On Fri, Jul 16, 2010 at 9:10 AM, H.S. wrote:
On 10-07-16 12:00 PM, Ron Johnson wrote:
Aren't you askig the wrong list?
The filesystem is vfat, files are being deleted from within Linux using
Linux tools and the partition just happens to be a Windows inst
On 07/16/2010 12:38 PM, H.S. wrote:
On 16/07/10 01:01 PM, Ron Johnson wrote:
I don't think you can of= just the "empty" parts of your partition.
Attached is a Python script I use to "zero" out the free space of a
mounted partition.
Thanks for the script. You are basically writing 0xFF to th
On Fri, Jul 16, 2010 at 9:10 AM, H.S. wrote:
> On 10-07-16 12:00 PM, Ron Johnson wrote:
>
>>
>> Aren't you askig the wrong list?
>>
>>
> The filesystem is vfat, files are being deleted from within Linux using
> Linux tools and the partition just happens to be a Windows installation* but
> could b
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On 07/16/2010 01:42 PM, Michael Iatrou wrote:
>
> This is rather a philosophical question than a technical one: it is part of
> UNIX mentality to have simple tools that can be put together to complete
> complicated tasks. Practically seen, if the
On 16/07/10 01:42 PM, Michael Iatrou wrote:
This is rather a philosophical question than a technical one: it is part of
UNIX mentality to have simple tools that can be put together to complete
complicated tasks. Practically seen, if the original poster was educated
with the principles of UNIX de
When the date was Friday 16 of July 2010, Jordan Metzmeier wrote:
> On 07/15/2010 08:46 PM, Michael Iatrou wrote:
> > I am skeptical whether there is any good reason for tools like wipe2fs,
> > zerofree and friends (if there are any...), when a dd && sync && rm
> > have the same result.
>
> You c
On 16/07/10 01:01 PM, Ron Johnson wrote:
I don't think you can of= just the "empty" parts of your partition.
Attached is a Python script I use to "zero" out the free space of a
mounted partition.
Thanks for the script. You are basically writing 0xFF to the available
disk space. I used to ha
On 07/16/2010 11:10 AM, H.S. wrote:
On 10-07-16 12:00 PM, Ron Johnson wrote:
Aren't you askig the wrong list?
The filesystem is vfat, files are being deleted from within Linux using
Linux tools and the partition just happens to be a Windows installation*
but could be any generic storage devi
On 07/15/2010 06:45 PM, Jordon Bedwell wrote:
> Anything, and I repeat anything, is recoverable, even if you remove the
> filesystem you can recover pieces of the file.
[citation needed]
When you do a low-level write to the disk, you're wiping out anything
and everything. One single pass of zeroe
On 10-07-16 12:00 PM, Ron Johnson wrote:
Aren't you askig the wrong list?
The filesystem is vfat, files are being deleted from within Linux using
Linux tools and the partition just happens to be a Windows installation*
but could be any generic storage device. So, no.
I presume you are imp
On 07/15/2010 11:05 AM, H.S. wrote:
I have a couple of hard disks in a computer which is to be recycled. I
want the windows OS in it to remain functional, but I want to be sure
that I have deleted all my personal files securely (never used the OS
that much anyway and there is hardly any importan
Mark wrote at 2010-07-15 15:55 -0500:
> Do you have an example of what your wipe and wipe2fs commands are that
> you've used? Didn't see much info on the websites here
> [2]http://wipe.sourceforge.net/ or here
$ man wipe
There are even examples.
> [3]http://web.cecs.pdx.edu/~cklin/wipe2fs/. Would
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On 07/15/2010 08:46 PM, Michael Iatrou wrote:
> I am skeptical whether there is any good reason for tools like wipe2fs,
> zerofree and friends (if there are any...), when a dd && sync && rm have the
> same result.
>
You could say this about many
On 7/15/2010 4:53 PM, Aaron Toponce wrote:
> On 07/15/2010 11:55 AM, H.S. wrote:
>> I was looking for just making the already deleted files unrecoverable by
>> a casual user. In other words, since a deleted file frees the space on
>> disk, by filling up the disk with all zeros and then deleting tha
When the date was Thursday 15 of July 2010, green wrote:
> thib wrote at 2010-07-15 13:13 -0500:
> > Take a look at shred (coreutils), wipe and secure-delete.
>
> +1 wipe; I have used it to wipe an entire block device.
> Also wipe2fs for zeroing unused space; and zerofree seems very similar.
I a
On 07/15/2010 11:55 AM, H.S. wrote:
> I was looking for just making the already deleted files unrecoverable by
> a casual user. In other words, since a deleted file frees the space on
> disk, by filling up the disk with all zeros and then deleting that zeros
> file would be overwriting the earlier
On Thu, Jul 15, 2010 at 1:41 PM, green wrote:
> thib wrote at 2010-07-15 13:13 -0500:
> > Take a look at shred (coreutils), wipe and secure-delete.
>
> +1 wipe; I have used it to wipe an entire block device.
> Also wipe2fs for zeroing unused space; and zerofree seems very similar.
>
Do you have
thib wrote at 2010-07-15 13:13 -0500:
> Take a look at shred (coreutils), wipe and secure-delete.
+1 wipe; I have used it to wipe an entire block device.
Also wipe2fs for zeroing unused space; and zerofree seems very similar.
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On Jo, 15 iul 10, 13:55:21, H.S. wrote:
>
> I was looking for just making the already deleted files unrecoverable by
> a casual user. In other words, since a deleted file frees the space on
> disk, by filling up the disk with all zeros and then deleting that zeros
> file would be overwriting the e
On Thu, Jul 15, 2010 at 9:05 AM, H.S. wrote:
>
> I have a couple of hard disks in a computer which is to be recycled. I
> want the windows OS in it to remain functional, but I want to be sure
> that I have deleted all my personal files securely (never used the OS
> that much anyway and there is h
Take a look at shred (coreutils), wipe and secure-delete.
-t
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On 15/07/10 12:31 PM, Wolodja Wentland wrote:
>>
>> Its first and second partitions (sdc1 and sdc2) are vfat. I was thinking
>> of mounting these on /mnt/scd1 (and scd2) and then doing:
>> # dd if=/dev/zero > /mnt/sdc1/zeros.bin; rm -f /mnt/sdc1/zeros.bin
>>
>> and the same for scd2. The idea is fi
On 15/07/10 01:38 PM, Perry E. Metzger wrote:
> On Thu, 15 Jul 2010 12:05:33 -0400 "H.S." wrote:
>> Its first and second partitions (sdc1 and sdc2) are vfat. I was
>> thinking of mounting these on /mnt/scd1 (and scd2) and then doing:
>> # dd if=/dev/zero > /mnt/sdc1/zeros.bin; rm -f /mnt/sdc1/zer
On Thu, 15 Jul 2010 12:05:33 -0400 "H.S." wrote:
>
> I have a couple of hard disks in a computer which is to be
> recycled. I want the windows OS in it to remain functional, but I
> want to be sure that I have deleted all my personal files securely
> (never used the OS that much anyway and there
On Thu, Jul 15, 2010 at 12:05 -0400, H.S. wrote:
>
> I have a couple of hard disks in a computer which is to be recycled. I
> want the windows OS in it to remain functional, but I want to be sure
> that I have deleted all my personal files securely (never used the OS
> that much anyway and there i
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