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Re: [Bug-ddrescue] how big should my MBR rescue be?

From: James Bardin
Subject: Re: [Bug-ddrescue] how big should my MBR rescue be?
Date: Fri, 25 Jul 2008 15:29:37 -0400
User-agent: Thunderbird (X11/20080724)

Ian Simmons wrote:
> The problem is that for some reason the first partition which is the
> active windows partition starts at  133677. I ran it anyway and rescued
> 1332 MB. Is it safe to assume that the MBR is in there somewhere?

No. The mbr is most likely still in the first sector, but if your not
trying to make a bootable copy, then you don't need it.

> I plan on installing a fresh copy of Windows to the drive which has a
> invalid ntfs,

I hope you're not planning on installing on the same drive that's
already failed?

> and all I'm trying to do is rescue files. When the rescue
> of /dev/sdh1 is finished will it be possible to mount the backup.img and
> just copy the files out of it or will I need to use ddrescue to restore
> the image to a drive?

It depends on whether the filesystem is intact. If you're lucky, you'll
be able to simply mount the rescue image and copy files. If not, you'll
need to rebuild the files with a recovery tool. ddrescue only does the copy.

> Also, I am using ddrescue because I read that it works faster by doing
> what dd_rhelp and dd_rescue accomplish by getting the good sectors
> first. It is working at the same slow pace of 130kb per second as
> dd_recue did. It has been running over 24 hours to rescue only 4 Gigs
> and reports not one bad sector so far. Is this normal?

Not usually, but it depends on what's wrong with your drive.


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