Subject: Re: File Size Limitations
To: Perry E. Metzger <>
From: Geert Hendrickx <>
List: netbsd-docs
Date: 01/18/2005 13:55:38
On Mon, Jan 17, 2005 at 10:08:21PM -0500, Perry E. Metzger wrote:
> "Geert Hendrickx" <> writes:
> > I also find there is very limited documentation on the filesystems
> > included in NetBSD.  About UFSv2 the docs only mention that "among other
> > enhancements, it is better suited for filesystems larger than 1 TB".
> > What does that mean, better suited?
> It uses 64 bit block numbers instead of 32 bit ones. Since blocks are
> 512 bits, well, you can see why 2TB becomes a hard limit.
> > And what is the difference then
> > between UFS v1 and v2 on my 10 Gb disk?  
> You have no reason to bother with v2 if you aren't dealing with things
> in the TB range.

What I've understood from various FreeBSD docs and mailing lists, is
that UFS v2 also supports snapshots (useful for creating backups of a
mounted disk), background fsck, ...  

So there ARE improvements in functionality (which also hold for <2TB
filesystems), so I'd think it IS worth documenting them.  

Just my 0.02 ...