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Re: large_file feature- where is it?



Of course I discovered the problem about 20 minutes after posting.. The
problem turned out to be some soft limits for user accounts. My
confusion over the large_file flag turned out to be a red herring, but
at least it was an educational one. 

Cheers,
-Darrell

On Mon, 2003-06-09 at 19:26, Andreas Dilger wrote:
> On Jun 09, 2003  14:47 -0400, Darrell Michaud wrote:
> > I recently ran into an issue where I couldn't create a file larger than
> > 2GB on a particular ext3 filesystem. I was under the (mistaken)
> > impression that >2GB support went in before ext3 support, and all ext3
> > filesystems would therefore support >2GB files on ia32.
> > 
> > So, I started poking around and found that some of my ext3 filesystems
> > have the "large_file" feature flag set on them, and others do not. I
> > cannot find a manpage for mke2fs anywhere that explains how to set this
> > flag, either at creation time or afterwards. When I try something like
> > "mke2fs -j -O large_file <dev>" mke2fs complains that it doesn't
> > understand the argument. Attempts to create ext3 filesystems using a
> > modern debian-based (2.4.18) rescue CD also failed to set the large_file
> > flag.
> > 
> > So, I guess my question is, in what version of mke2fs was support for
> > large files implemented, and how do you enable it, if it's not the
> > default behavior?
> 
> That flag is set when a large file is created on the filesystem, and is
> not a feature you "activate" per se.  Either your kernel "gets it" or
> it doesn't.
> 
> There should never be a problem where you can create a >2GB file on one
> filesystem and not on another on the same system with the same program.
> Depending if your kernel (unlikely), tool, or libraries, you may still
> have problems creating a >2GB, but that isn't the filesystem's fault.
> 
> Cheers, Andreas
> --
> Andreas Dilger
> http://sourceforge.net/projects/ext2resize/
> http://www-mddsp.enel.ucalgary.ca/People/adilger/
> 





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