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Subject:	Re: Is there a partitioning toll and file system tool in cygwin?
From:	Warren Young <wyml AT etr-usa DOT com>
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Date:	Thu, 12 May 2016 08:59:48 -0600
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On May 12, 2016, at 8:16 AM, Peder Sverdrup <psverdrup AT yahoo DOT com> wrote:
> 
> I would like to format an external harddrive with ext3.

Marco’s answer will get you that far.  However…

> (And then do a backup of my windows file with my rsync script to the external harddrive.)

…the e2fsprogs package isn’t going to get you a Windows kernel driver for ext3 filesystems, so you aren’t going to be able to mount the formatted filesystem under Windows.  All you can do with e2fsprogs is write a fresh filesystem onto a block device and then run things like tune2fs to modify it in place.

Cygwin generally leaves low-level filesystem issues up to the OS.  The only filesystems Cygwin actually provides are virtual ones like /dev and /proc.

I think you should be looking at something like Paragon ExtFS for Windows instead:

  https://www.paragon-software.com/home/extfs-windows/

There are alternatives, but I cannot recommend any from personal experience.  I haven’t used Paragon’s Windows products, either, but I have used their NTFS for OS X product, and never had any problems with it.

You might also consider going the other way: use NTFS on that backup drive to make Windows (and thus Cygwin) happy, then use fuse-ntfs3g on the Linux side to mount the drive.

Either way you go, you’re going to run into semantic mismatches, such as permission mapping problems.  That’s unavoidable.

> For instance - I can not find fdisk.

I don’t know about other extfs drivers for Windows, but Paragon’s includes a disk partitioning and formatting tool.
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