Filesystem of choice for a Linux/FreeBSD shared backup disk?

Gary Newcombe gary at
Wed Sep 24 02:34:22 UTC 2008

On Wed, 24 Sep 2008 04:02:11 +0200 (CEST), Andreas Davour
<ante at Update.UU.SE> wrote:

> On Wed, 24 Sep 2008, Gary Newcombe wrote:
> > On Wed, 24 Sep 2008 00:48:48 +0200 (CEST), Andreas Davour
> > <ante at Update.UU.SE> wrote:
> >
> >> On Wed, 24 Sep 2008, Wojciech Puchar wrote:
> >>
> >>>> about trying to make the data as available as possible. Do anyone here have
> >>>> any suggestion about what kind of filesystem would be best to use? Can ufs2
> >>>> be read by linux? It looks like it from my short persual of google hits,
> >>>> but it also looks kind of complicated. IS ext2 a safer bet? Anything
> >>>> totally different?
> >
> > Have you considered ZFS as an option? It's a good option for a backup
> > disk where speed isn't too much of an issue.
> AFAIK, ZFS is not yet ready for Linux.

That's true and as it stands, licensing issues mean it won't be a
kernel filesystem in linux. However, ZFS works fine using the fuse
module. I use ZFS as a common filesystem for backup. The only issue is
the differing versions of ZFS and which is used to create the pool.

> >>> use ext2. FreeBSD handles ext2 fine, while linux doesn't handle UFS2 easily.
> >>> just remember ext2 performance is lower, but for backups, copying etc. it
> >>> shouldn't matter
> >>
> >> I'll remember the performance hit.
> >>
> >> While Linux don't handle UFS2 easily, how much of a trouble is it? I
> >> found a text about recompiling your kernel. Do you know if that's still
> >> needed? My source was kind of old.
> >
> > Just load it as a kernel module
> >
> > kldload ext2fs
> Now you are refering to FBSD, I was talking about using UFS2 in Linux.

Sorry, I should learn to read. Afaik, ufs2 is read only under linux,
write support is available but the module isn't built by default and
it's listed as 'dangerous'.

> /Andreas
> -- 
> A: Because it fouls the order in which people normally read text.
> Q: Why is top-posting such a bad thing?
> A: Top-posting.
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