[rescue] FreeBSD and ZFS, was Re: 3ware raid

[N. Miller]

On Jul 27, 2011, at 4:11 PM, Shawn Wallbridge wrote:

> From what I remember about a talk by Bryan Cantrill a while back,
> Solaris ZFS wants direct access to the disk. They do some funky stuff,
> because after testing they realized that you can't trust anything.
> They had controllers, cables, and even disk 'lie' about things, or
> introduce errors. So when they developed the x45(0,4)0's, they went
> with controllers that they could directly access the drives, in some
> low level way.
>
> But again, this was all a long time ago, so I could have bit rot in my
> grey matter ;)

That's exactly right, Shawn.  Our biggest issues at work with the x4100/4140's
is just this: the LSI & Adaptec RAID don't present real JBOD to ZFS.