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Message-Id: <0081ACB2-54C6-4AE5-B55F-CEAF299CFC7A@kupper.org> Date: Wed, 3 Feb 2010 16:18:25 +0100 From: Thomas Kupper <thomas@...per.org> To: Michael Rubin <mrubin@...gle.com> Cc: linux-ext4 <linux-ext4@...r.kernel.org> Subject: Re: mount ext2/3 as ext4 - no changes to ext2/3 fs structures? On 1 Feb 2010, at 06:54, Michael Rubin wrote: > On Sun, Jan 31, 2010 at 2:31 PM, Thomas Kupper <thomas@...per.org> wrote: >> Consider the following scenario: Assume I have a partition formated with ext2 on a computer with some 2.4.x kernel. Now I mount this ext2 partition on another computer as ext4 using a 2.6.29+ kernel. After that I take the disk back to the older computer and mount the ext2 on the 2.4.x kernel with the ext2 driver. > > I have seen this work as long as you don't add the "extents" or other > ext4 specific mount options. Our kernels are not quite as up to date > as 2.6.29 and we have not done extensive testing with that kernel. Not > sure anyone has tested this case thoroughly. Thanks alot for your answer, that'll do for me to start with. Nothing on computers is guaranteed to work perfect :) > mrubin Cheers, Thomas-- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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