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Date:	Fri, 22 Sep 2023 16:10:05 -0700
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Subject:	Re: /usr/bin/dd *.iso to USB stick?
To:	cygwin AT cygwin DOT com
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From:	Jim Garrison via Cygwin <cygwin AT cygwin DOT com>
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Cc:	Jim Garrison <jhg AT jhmg DOT net>
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On 9/21/2023 22:40, Martin Wege via Cygwin wrote:
> Hello,
> 
> How can I use /usr/bin/dd to copy a *.iso image (Debian netinstall
> boot image) to a USB stick as raw bytes?

I do this frequently.  You must start the Cygwin shell with admin
rights, then use Windows Disk Management mmc app to identify
the disk and convert from Disk n to /dev/sd[x], where Disk 0 is
/dev/sda, Disk 1 is /dev/sdb, etc.

BIG CAVEAT: You're in admin mode.  Use the wrong device name and you
will trash target device if it's writable, including your Windows boot
drive.  And no, the boot drive is not always Disk0 /dev/sda.

I always use hexedit to examine enough of the target device to assure
myself that it's the correct target.

-- 
Jim Garrison
jhg AT acm DOT org


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