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Re: Re: [Bug-ddrescue] badblocks - what data


From: andrew zajac
Subject: Re: Re: [Bug-ddrescue] badblocks - what data
Date: Sun, 15 Nov 2009 09:27:17 -0800 (PST)

Your drive is made up of 512 byte blocks.  Your NTFS filesystem probably is made up of 4096 byte blocks.

Hypothetically, if badblocks tells you that the tenth block is bad, that is not the same as the tenth block in the NTFS filesystem.  It would actually fall in the second 4096-byte NTFS block since 4096/512=8.

--- On Sun, 11/15/09, address@hidden <address@hidden> wrote:

From: address@hidden <address@hidden>
Subject: Re: Re: [Bug-ddrescue] badblocks - what data
To: "andrew zajac" <address@hidden>
Received: Sunday, November 15, 2009, 12:05 PM

4096 byte blocks?

Why then am I using -b 512 when I do a badblocks command on a NTFS drive? Is that do with clusters (as opposed to blocks?)

Cheers

-Al


On , andrew zajac <address@hidden> wrote:
> Hi Al.
>
> Use The Sleuth Kit.  Specifically, the icat and ifind tools.
>
> Here is an example:
>
> http://ubuntu-rescue-remix.org/node/180
>
> Just make sure you are using the same size blocks.  NTFS uses 4096 byte blocks by default.
>
> Cheers!
>
>
> --- On Sun, 11/15/09, Al Grant address@hidden> wrote:
>
> From: Al Grant address@hidden>
> Subject: [Bug-ddrescue] badblocks - what data
> To: address@hidden
> Received: Sunday, November 15, 2009, 3:17 AM
>
>
> Hi Guys,
>
> I know this is slightly OT, but hoping someone here will know the answer. My
> question mainly relates to NTFS disks that are tested under Linux with
> badblocks command.
>
> If you
> find badblocks, is there a way to see if (a) they are on slack space
> and (b) if they are adjacent or in the middle of a file what file.
>
> I assume this could be done by comparing the badblocks with the FAT?MFT or
> similar?
>
> Cheers in advance
>
> -Al
>
> --
> View this message in context: http://old.nabble.com/badblocks---what-data-tp26357276p26357276.html
> Sent from the Gnu - ddrescue mailing list archive at Nabble.com.
>
>
>
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