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Subject: Re: Really big files?
From: Greg Freemyer <freemyer-ml AT NorcrossGroup DOT com>
Reply-To: freemyer-ml AT NorcrossGroup DOT com
To: cygwin AT cygwin DOT com
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References: <1071535713 DOT 1524 DOT 20 DOT camel AT david DOT internal DOT NorcrossGroup DOT com> <3FDF76D4 DOT D5E889A0 AT dessent DOT net>
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Message-Id: <1071621014.5059.27.camel@david.internal.NorcrossGroup.com>
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Date: Tue, 16 Dec 2003 19:30:14 -0500
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On Tue, 2003-12-16 at 16:19, Brian Dessent wrote:
> Greg Freemyer wrote:
> 
> > I just tried to dd the first 163 GB of a raw drive to a image file.
> > 
> > It failed at about 145 GB.  Should it work?
> > 
> > I had plenty of free space.
> > 
> > I'm using cygwin.dll ver. 1.5.5 and a recent dd  (I think, see cygcheck -s output).
> > 
> > === Session Log
> > $ mount -f -b //./physicaldrive2 /dev/todds
> 
> Just a completely random guess here:  Is 'physicaldrive2' an active
> system drive?  IIRC there are some parts of windows that cannot be read
> by anything but the kernel itself, such as the SAM database (or
> something along those lines.)  If this is the case then you'd have to do
> the image when the partition is not active.  I don't know how or if
> tools like Ghost get around this.
> 
> Brian

No, it is not an active system drive.  By chance this drive had its
partition table blown away.  Win2k is not even assigning it a drive
letter.

Also, if you look at the dd output

>> 
dd: writing `/cygdrive/e/full_image': Permission denied
35838209+0 records in
35838208+0 records out
>>

You see that the failure was on the write, not on the read.

I have over 50 GB free even with that file in place, so I'm definately
not short of space.

Also, I believe NTFS for Win2k has a 2 TB filesize max., so that should
not be a problem.

Greg




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