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Problem with dd to raw disks

From: Anees Mannesseri <ansmns at yahoo dot com>
To: cygwin at cygwin dot com
Date: Mon, 1 Mar 2004 04:29:21 -0800 (PST)
Subject: Problem with dd to raw disks

Hi,
  I am facing problems issuing dd to raw disks from
windows 2k3 server thru cygwin.

dd if/dev/zero of="\\\\.\\PHYSICALDRIVE4" count=50000
seek =3 fails with the error 

dd: opening `\\\\.\\PHYSICALDRIVE4': Invalid argument

But it works the other way, I mean if i give
"\\\\.\\PHYSICALDRIVE4" as the input device and
/dev/null as the output device.
Any hints/clues ?

Thanks
Anees

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