linux-ext4 - Re: Fsck and large file

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Message-Id: <DA3F5378-41F1-4A3D-BA1D-C40FEBBE3B19@dilger.ca>
Date:	Sun, 28 Oct 2012 12:01:51 -0600
From:	Andreas Dilger <adilger@...ger.ca>
To:	"Nelson, John R" <John_Nelson@...dent.uml.edu>
Cc:	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>
Subject: Re: Fsck and large file

On 2012-10-28, at 6:00, "Nelson, John R" <John_Nelson@...dent.uml.edu> wrote:

> How big of a file does FSCK consider a large file? I mean by the output snipplet below

That is 2GB, which is the limit beyond which the file size needs to also use the i_size_high field to store the file size. In days of yore, this was a change of the on-disk format, and e2fsck needed to either support that or refuse to check the filesystem. 

Cheers, Andreas

>  18713 inodes used (0.03%, out of 59727872)
>         248 non-contiguous files (1.3%)
>          29 non-contiguous directories (0.2%)
>             # of inodes with ind/dind/tind blocks: 0/0/0
>             Extent depth histogram: 19083/39
>    13643522 blocks used (5.71%, out of 238892544)
>           0 bad blocks
>           3 large files
> 
>       15803 regular files
>        3318 directories
>           0 character device files
>           0 block device files
>           0 fifos
>           0 links
>          14 symbolic links (14 fast symbolic links)
>           0 sockets
> 
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