Error when erasing unused space.

Please post your support questions here.

Moderators: Eraser DevTeam, Eraser Moderators

Error when erasing unused space.

Postby c0m4r » Mon Jun 07, 2010 1:02 pm

Hi,

I am getting trouble with erasing unused space.

The error occurs:

Code: Select all
Session: 7 czerwca 2010 14:55:54
7 czerwca 2010 14:58:49   Error   D:\System Volume Information did not have its cluster tips erased because of the following error: Access to the path 'D:\System Volume Information' is denied.


and Eraser stops processing.

I have already looked for solution but I can't handle it. I will really appreciate your help.

Best regards,
Andrew
c0m4r
 
Posts: 6
Joined: Mon Jun 07, 2010 12:52 pm

Re: Error when erasing unused space.

Postby DavidHB » Mon Jun 07, 2010 11:04 pm

The error in itself is not a problem; Eraser (like any program running under Windows) cannot access protected system files. But that should not stop Eraser running. Please look at Help:About (the Eraser Window does not necessarily give the correct information), and tell me which version/build of Eraser you are running, and under which version of Windows.

David
I am not an Eraser programmer, but a long-time user; my views may not be the same as those of the Eraser programming team.
Before posting, please read the top 4 topics in the Eraser FAQ, which already provide many of the answers users need.
DavidHB
Eraser Wizard
 
Posts: 2166
Joined: Sat Jan 23, 2010 8:10 pm
Location: Isle of Wight, UK

Re: Error when erasing unused space.

Postby c0m4r » Tue Jun 08, 2010 8:42 am

But that should not stop Eraser running.

Exactly but I forgot about another error:

Value does not fall within the expected range.


I am running Windows Vista Home Premium SP2 32bit
Eraser 6.0.7.1893 (Built: 10 April 2010)
c0m4r
 
Posts: 6
Joined: Mon Jun 07, 2010 12:52 pm

Re: Error when erasing unused space.

Postby DavidHB » Tue Jun 08, 2010 12:39 pm

How does this error show up - in the Task Log or as a program or Windows error message?

David
I am not an Eraser programmer, but a long-time user; my views may not be the same as those of the Eraser programming team.
Before posting, please read the top 4 topics in the Eraser FAQ, which already provide many of the answers users need.
DavidHB
Eraser Wizard
 
Posts: 2166
Joined: Sat Jan 23, 2010 8:10 pm
Location: Isle of Wight, UK

Re: Error when erasing unused space.

Postby c0m4r » Wed Jun 09, 2010 2:09 pm

In the Task Log.
c0m4r
 
Posts: 6
Joined: Mon Jun 07, 2010 12:52 pm

Re: Error when erasing unused space.

Postby DavidHB » Thu Jun 10, 2010 11:27 am

Not being an Eraser Programmer, I don't know why the program can do this; until Joel gets back on line (and his commitments are such that I don't know when that will be), the cause will be a mystery. In the meantime, try using the latest build (6.1.0.2154), to see if that helps. If you then revert to 6.0.7, please follow the advice in the sticky at the head of this forum before you do so.

David
I am not an Eraser programmer, but a long-time user; my views may not be the same as those of the Eraser programming team.
Before posting, please read the top 4 topics in the Eraser FAQ, which already provide many of the answers users need.
DavidHB
Eraser Wizard
 
Posts: 2166
Joined: Sat Jan 23, 2010 8:10 pm
Location: Isle of Wight, UK

Re: Error when erasing unused space.

Postby c0m4r » Thu Jun 10, 2010 9:16 pm

Thank you David. On 6.1.0.2154 it works very well. I was i little bit scared about my data because it is still beta version but this build done everytihing just fine.

Best regards,
Andrew
c0m4r
 
Posts: 6
Joined: Mon Jun 07, 2010 12:52 pm

Re: Error when erasing unused space.

Postby DavidHB » Fri Jun 11, 2010 10:47 am

I'm glad it works. The main limitation I have found with build 2154 is that it cannot successfully wipe free space on a system drive with erasing of cluster tips enabled. Otherwise, it seems quite usable.

David
I am not an Eraser programmer, but a long-time user; my views may not be the same as those of the Eraser programming team.
Before posting, please read the top 4 topics in the Eraser FAQ, which already provide many of the answers users need.
DavidHB
Eraser Wizard
 
Posts: 2166
Joined: Sat Jan 23, 2010 8:10 pm
Location: Isle of Wight, UK

Re: Error when erasing unused space.

Postby c0m4r » Fri Jun 11, 2010 6:03 pm

it cannot successfully wipe free space on a system drive with erasing of cluster tips enabled

What exactly happens when you erasing with cluster tips enabled? I mean I know what this function is, I ask why you cannot successfully wipe free space on your drive.
c0m4r
 
Posts: 6
Joined: Mon Jun 07, 2010 12:52 pm

Re: Error when erasing unused space.

Postby DavidHB » Fri Jun 11, 2010 9:10 pm

c0m4r wrote:What exactly happens when you erasing with cluster tips enabled?

The free space wipe is exactly the same whether the cluster tips option is used or not; Eraser overwrites all the space marked as free by the file system. Erasing cluster tips is a different function (though one that it makes no sense to use unless you are also wiping the free space, which is why the two are done together). As a very simple explanation, the file system allocates blocks of space of a fixed size for each file. The file data rarely if ever exactly fills the allocated space, so some space is left over at the end of the last block. This is the cluster tip, and it can in theory contain user data left over from a previous use of the space. Erasing the cluster tip ensures that such data cannot be recovered. In practice, for ordinary users, the degree of risk associated with not erasing cluster tips is much less than the risks associated with not wiping free space; cluster tips are much less accessible than free space and, even in the worst case, any data recovered is likely to be fragmentary.

c0m4r wrote:I ask why you cannot successfully wipe free space on your drive.

If I try to wipe free space on a system (C:) drive with erasing of cluster tips enabled, the program crashes with an error message, typically about 30 minutes into the process, and (I believe) before the free space wipe actually begins. If I disable cluster tip erasing, the free space wipe completes normally and (as a check with Recuva shows) usually leaves few if any recoverable files behind. So I wipe free space on Drive C:, I just can't erase the cluster tips. Which I don't regard as a huge problem. Incidentally, this problem does not occur when I am wiping a non-system drive.

I hope that this explains things.

David
I am not an Eraser programmer, but a long-time user; my views may not be the same as those of the Eraser programming team.
Before posting, please read the top 4 topics in the Eraser FAQ, which already provide many of the answers users need.
DavidHB
Eraser Wizard
 
Posts: 2166
Joined: Sat Jan 23, 2010 8:10 pm
Location: Isle of Wight, UK

Re: Error when erasing unused space.

Postby c0m4r » Sat Jun 12, 2010 12:43 am

Thank you David. This is very good explanation. I really appreciate it.
Topic can be locked.

Best regards,
Andrew
c0m4r
 
Posts: 6
Joined: Mon Jun 07, 2010 12:52 pm


Return to Eraser Support

Who is online

Users browsing this forum: Yahoo [Bot] and 2 guests