linux-ext4 - Re: errors following ext3 to ext4 conversion

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Date:	Wed, 26 Aug 2015 22:43:45 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	"Theodore Ts'o" <tytso@....edu>,
	Chris Hunter <chris.hunter@...e.edu>
CC:	linux-ext4@...r.kernel.org
Subject: Re: errors following ext3 to ext4 conversion

On 8/26/15 10:39 PM, Theodore Ts'o wrote:

> Merely turning on the extents feature doesn't actually convert any
> files to use extents.  So if e2fsck is showing errors like this:
> 
>> e2fsck shows a variety of errors:
>> Pass 1: Checking inodes, blocks, and sizes
>> Inode 118843400, end of extent exceeds allowed value
>>         (logical block 1409, physical block 3803034390, len 976)
>> Inode 118843400, end of extent exceeds allowed value
>>         (logical block 2385, physical block 3803056554, len 4294966945)
> 
> This suggests that the file system was likely corrupted before you
> tried converting the file system, since there should not have been any
> extent-mapped files in an ext3 file system.

Hm, do we not require a freshly-fsck'd fs (tm) prior to a conversion attempt,
like we do (I think) for resize?

That might be a good idea ...

-Eric

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