Writing contigiously to UFS2?
gpalmer at freebsd.org
Fri Sep 21 06:19:20 PDT 2007
On Fri, Sep 21, 2007 at 02:50:14PM +0200, Ivan Voras wrote:
> Eric Anderson wrote:
> >The largest file size per chunk in a cylinder group is calculated at
> >newfs time, which determines also how many cylinder groups there should
> >be. I think the largest size I've seen was something in the 460MB-ish
> >range, meaning any contiguous write above that would span more than one
> >cylinder group.
> Hmm, how did you manage to create a file system with such large cylinder
> groups? I've experimented with smallnum-TB file systems and still
> couldn't make them larger than around 190 MB (though I wasn't actively
> trying, just observed how they turned out).
Presumably by using the -c parameter to newfs.
The original poster might get some traction out of a combination of
-c and -e parameters to newfs, although the fundamental behaviour
will remain unchanged.
More information about the freebsd-fs