ZFS Advice

[Peter Schuller]

> The AoC-SAT2-MV8 is based on the "Marvell Hercules-2 Rev. C0 SATA host
> controller", which seems to be AKA 88SX6081, which is listed as
> supported by the ata driver in 7.0-RELEASE.  Has anyone had any ZFS
> experience with it?

Yes; it has been working quite fine for me with 7 up to a release-candidate. 
In 7.0-RELEASE you must disable the hptrr driver because it eats the device. 
See:

   http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/120615
   http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/120842

When I say "working fine", this is with 8 SATA drives (6 of them in a raidz2, 
two of them for other stuff) and not having any issues like corruption, 
timeouts or whatever else people have had with shaky controllers.

However, I cannot speak to performance because it's a PCI-X card that I've 
plugged into a PCI slow, so throughput is limited by the PCI bus (and the 
machine is otherwise not the fastest to begin with).

Note that this is on 32 bit; haven't been able to try it on 64 bit because I 
the PCI-X card wouldn't work on the motherboard (again PCI, so it's 
hit-and-miss) where I would otherwise have tried it.

I'd love to find a buyable PCI-E version that also worked in FreeBSD... I'll 
see if the link in your post contains any such hints.

-- 
/ Peter Schuller

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