hardware raid solutions?

[ubuntu at rio.vg]

Eric S. Johansson wrote:
> 
>> Despite http://arstechnica.com/news.ars/post/20051117-5595.html, I
>> don't think ZFS is available for linux :(
>>
>> But if you can wait a few months...
>>
>> http://zfs-on-fuse.blogspot.com/2006/05/announcing-zfs-on-fuselinux.html
> 
> I just read up about that and baby oh baby, does that looks sweet.  if 
> I'm seeing what I think I'm seeing, it is a good chance we can eliminate 
> mdX and maybe, just maybe eliminate LVM.
> 
> I may just take a bunch of crappy discs from the basement and a Pentium 
> II I have lying around and test this puppy with some sort of exercising 
> tool.
> 
> the big question would be how to partition an existing system so that 
> you could boot, get the right configuration files and then start 
> working.  It will definitely take some planning.
> 

Is it just me, or does ZFS just sound too good to be true?

>From the opensolaris site:

"What is ZFS?

ZFS is a new kind of filesystem that provides simple administration,
transactional semantics, end-to-end data integrity, and immense
scalability. ZFS is not an incremental improvement to existing
technology; it is a fundamentally new approach to data management. We've
blown away 20 years of obsolete assumptions, eliminated complexity at
the source, and created a storage system that's actually a pleasure to use."

Doesn't that just sound like a scam?  I keep waiting to hear what the
downside is...  or maybe I've just been in this business too long and
have gotten burned too many times...