[ltp] cloning 14G drives

Mark Kennedy linux-thinkpad@www.bm-soft.com
Tue, 23 Nov 1999 11:49:34 -0500


Chris Schumann wrote:
> 
> Mark,
> 
> This is highly unlikely since DOS is limited to working with 8GB drives,
> or rather the first 8GB of any drive.  However, there could be software
> (DOS or otherwise) that accesses the drive directly.
> 
> Linux should be able to copy any drive up to 137GB, the limit of LBA
> addressing, just using dd.
> 
> Can anyone confirm this?
> 
> On Mon, 22 Nov 1999, Mark Kennedy wrote:
> > assumption: you can't clone a drive larger than 2G with linux since
> > there is no kernel support for 64-bit offsets on intel hardware
> > (yet) and since there is no I/O interface that uses block numbers
> > instead of byte offsets.  is this assumption right?  if it is,
> > does anyone know of any freely available DOS-based clone writer utility?
> > or does anyone have a recommendation for a commercial alternative?
> 
> Chris Schumann <whizkid@dwave.net>
> 
> "Wait a minute, Joe. If what you're saying is true,
> then I still don't care." - Dave Nelson, News Radio
> 
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that's what i thought originally.  but empirically, it isn't so.  
i tried 'dd' and a small perl program (based on sysread).  both 
stopped at approx. the same barrier: 7,560M.

/mark
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